Abstract

The Future of Neuroscience: Flexible and Wireless Implantable Neural Electronics

This review article presents challenges in engineering and neuroscience in developing miniaturized and biointegrated alternatives, in the form of microelectrode probes.

MODs vs. NPs: Vying for the Future of Printed Electronics

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Abstract

MODs vs. NPs: Vying for the Future of Printed Electronics

This Minireview compares two distinct ink types, namely metal‐organic decomposition (MOD) and nanoparticle (NP) formulations, for use in the printing of some of the most conductive elements: silver, copper and aluminium.

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Skin‐Like Electronics for Perception and Interaction: Materials, Structural Designs, and Applications

Herein, the existing flexible sensing materials and microstructures, including flexible stimuli‐responsive materials and response‐ and stretchability‐enhanced microstructures, are reviewed.

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Silk and Paper: Progress and Prospects in Green Photonics and Electronics

Photonic and electronic devices currently face challenges in terms of improved efficiency of energy harvesting and light emission, renewable energy and materials, and the development of eco‐friendly materials.

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3D Assembly of Graphene Nanomaterials for Advanced Electronics

In this progress report, the recent progress in the fabrication of graphene‐based devices for advanced electronics using controlled assembly is reported.

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Rubbery Electronics Fully Made of Stretchable Elastomeric Electronic Materials

This work reviews the recent progress in developing rubbery electronics, including the crucial stretchable elastomeric materials of rubbery conductors, rubbery semiconductors, and rubbery dielectrics.

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Programmable Stimulation and Actuation in Flexible and Stretchable Electronics

This review summarizes some of the most important progresses on the stimulating/actuating capabilities (e.g., electrical, thermal, mechanical, optical, and chemical stimulation) of flexible/stretchable electronics.

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Principles of Laser Scanning Microscopes - Part I

The first part of this freely accessible tutorial article is focused on confocal optical systems, 2D and 3D scanning, confocal effect and extended focus image, and scanning mechanisms.

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Principles of Laser Scanning Microscopes - Part II

In the second part of the tutorial, the features and applications of industrial laser scanning microscopes, concentrating on the reflection‐type confocal laser scanning microscope built for high resolution detection are described.

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Advanced Production Routes for Metal Matrix Composites

The use of metal matrix composites (MMCs) in a variety of products is significantly increasing with time. However, the future usage of MMC products is very much dependent on their beneficial aspects and hence it is critical to ensure in a robust repeatable manner the superior physical property advantages. This article provides an overview of advanced production routes for MMCs.

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A Review on Direct Assembly of Through‐the‐thickness Reinforced Metal–polymer Composite Hybrid Structures

The current status and state‐of‐art direct assembling technologies are reviewed in this article. Examples of reviewed metal structuring techniques include micromachining, stamping, Surfi‐Sculpt, additive manufacturing, cold metal transfer, and metal injection molding structuring.

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Halide Perovskite Composites for Photocatalysis: A Mini Review

This mini review summarizes the recent progresses on the design and development of halide perovskite composites for various photocatalytic reactions.

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Residual Stress in Fiber Reinforced Thermosetting Composites: A Review of Measurement Techniques

The aim of this article is to provide an up to date review of the current state of the art in experimental techniques for the determination of residual stress in thermosetting fiber reinforced composites.

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On the Molecular to Continuum Modeling of Fiber‐Reinforced Composites

A multiscale approach to model fiber‐reinforced composites, those that are characterized by an isotropic orientation of fibers, is presented.

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Laminated Object Manufacturing of Ceramic‐Based Materials

In this review article, a detailed evaluation of the applicability of laminated object manufacturing in the near net shaping ceramic‐based materials is presented.

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Additive Manufacturing of Polymer Matrix Composite Materials with Aligned or Organized Filler Material

This article reviews the combinations of fabrication and filler material alignment methods used to fabricate polymer matrix composite materials, in terms of operating and design parameters including size, resolution, print speed, filler material alignment time, polymer matrix and filler material requirements, and filler manipulation requirements.

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Effect of High‐Energy Ball Milling on Mechanical Properties of the Mg–Nb Composites Fabricated through Powder Metallurgy Process

New biocompatible and biodegradable Mg–Nb composites used as bone implant materials are fabricated through powder metallurgy process.

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Poly(Lactic Acid)–Thermoplastic Starch–Cotton Composites: Starch‐compatibilizing Effects and Composite Biodegradability

In this study, PLA was reinforced with natural cotton and thermoplastic starch to obtain a biodegradable and lower cost composite.

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An Investigation on the Mechanical and Tribological Properties of Carbon Fiber/Polyimide Composites at Elevated Temperatures

Carbon fiber reinforced thermoplastic polyimide composites were prepared, and the mechanical properties and tribological behaviors at various sliding conditions were systematically investigated.

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Comparative Structural and Mechanical Studies on Polyamide 6 Knitted‐Reinforced Single Polymer Composites Prepared by Different Reactive Processing Techniques

Single polymer laminate composites based on anionic polyamide 6 matrix‐reinforced by PA6 knitted textile structures were produced by nylon reactive injection molding and powder coating/compression molding processing techniques.

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Mechanical and Thermal Properties of Fishbone‐based Epoxy Composites: The Effects of Thermal Treatment

In this work, the fishbone particles were used in epoxy composites for the semi‐structural applications.

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Thermoplastic Polyvinyl Alcohol/Multiwalled Carbon Nanotube Composites: Preparation, Mechanical Properties, Thermal Properties, and Electromagnetic Shielding Effectiveness

This study uses the solution mixing method to combine plasticized polyvinyl alcohol as a matrix, and multiwalled carbon nanotubes as reinforcement to form PVA/MWCNTs films.

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Achieving Pseudo‐Ductile Behavior of Carbon Fiber Reinforced Polymer Composites via Interfacial Engineering

This article presents an investigation of the properties of interfacial engineered carbon fiber reinforced polymer composites.

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Seeing is Believing: In Situ/Operando Optical Microscopy for Probing Electrochemical Energy Systems

This review discusses a range of in situ/operando techniques based on optical microscopy reported in literatures for studying electrochemical energy systems.

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Polymer‐Based Low‐Temperature Thermoelectric Composites

Thermoelectric materials allow direct conversion of waste heat energy into electrical energy, thus contributing to solving energy related issues. In this review article, the most promising research in the field is highlighted and thoroughly analyzed.

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Evolving Strategies for Producing Multiscale Graphene‐Enhanced Fiber‐Reinforced Polymer Composites for Smart Structural Applications

The primary focus of this review article concerns the structural graphene‐enhanced fiber‐reinforced polymer composites and discussion on the corresponding manufacturing methodologies for the effective incorporation of graphene into these systems.

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Direct Assembly of Through‐the‐thickness Reinforced Metal–polymer Composite Hybrid Structures

Constant efforts to reduce the structural weight of transportation systems as a solution to control emission levels are currently shaping the way modern cars and airplanes are designed and manufactured.

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Processing of Fiber‐reinforced Ultra‐high Temperature Ceramic Composites

Ultra‐high temperature ceramics have emerged as promising materials for high‐temperature aerospace applications due to their high melting temperature and superior ablation performance. Even still, they have yet to reach their full potential due to the catastrophic brittle failure that typically accompanies the intrinsic low fracture toughness of ceramic materials.

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Compression Fatigue Testing Setups for Composites

This review provides an overview of existing methods for the characterization of composites, i.e., setups for testing fiber reinforced polymer composites under compression and discusses their applicability to fatigue testing.

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Reinforcing the Near Eutectic Aluminum–Silicon Alloy with Graphene: An Approach toward Self‐Lubricating Composite

Herein, the reinforcement of near eutectic Al–Si (ADC12) alloy with the reduced graphene oxide (rGO) is demonstrated. The structural, mechanical, metallurgical, and tribological characteristics are conducted to understand the role of rGO as a reinforcement phase.

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Biodegradation of Polyurethane‐polyhydroxybutyrate Elastomeric Composite Investigated From Morphological and Structural Viewpoint

Morphological, structural, and tensile changes of polyurethane‐poly(3‐hydroxybutyrate) (PU‐PHB) elastomeric composites were evaluated after accelerated test in standard compost media. Size of PHB particles together with their uniform dispersion in the matrix were found to be key parameters for material's resistivity against degradation media.

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An Integrated Approach to Thermoelectrics: Combining Phonon Dynamics, Nanoengineering, Novel Materials Development, Module Fabrication, and Metrology

This review discusses the longstanding efforts to develop advanced thermoelectrics through a multidisciplinary approach by combining condensed matter physics, nanotechnology, solid‐state chemistry, electrical engineering, mechanical engineering, and metrology.

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Electrochemical Impedance Spectroscopy Study of Commercial Li‐Ion Phosphate Batteries: A Metrology Perspective

This review article provides a number of starting‐point parameters for newcomers to metrological investigations.

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A New Frontier of Printed Electronics: Flexible Hybrid Electronics

Here, the fundamental building blocks of an Flexible Hybrid Electronics system, printed sensors and circuits, thinned silicon ICs, printed antennas, printed energy harvesting and storage modules, and printed displays, are discussed

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Fast and Reproducible Wettability Switching on Functionalized PVDF/PMMA Surface Controlled by External Electric Field

In this paper, the novel material with controllable wettability switching triggered by external electric field is developed.

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In Situ Integration of SERS Sensors for On‐Chip Catalytic Reactions

Herein, reported is the fabrication of an integrated surface‐enhanced Raman scattering (SERS) sensor and graphene‐based catalytic chip by laser scribing of graphene oxide (GO) and Ag nanoparticles (AgNPs) composite (AgNPs@GO).

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Reviewing and Understanding the Stability Mechanism of Halide Perovskite Solar Cells

In this work, four different key factors that influence the stability of halide perovskites are summarized.

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Monolithic Perovskite Tandem Solar Cells: A Review of the Present Status and Advanced Characterization Methods Toward 30% Efficiency

In this review, the main scientific and engineering challenges in the field are presented, alongside a discussion of the current status of three main perovskite tandem technologies: perovskite/silicon, perovskite/CIGS, and perovskite/perovskite tandem solar cells.

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Quantum Dots Microstructural Metrology: From Time‐Resolved Spectroscopy to Spatially Resolved Electron Microscopy

In this review, comprehensive studies on the state‐of‐the‐art metrology approaches used in QD research are introduced, with particular focus on time‐resolved and spatially resolved spectroscopy and microscopy.

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Laser‐Induced Graphene Tapes as Origami and Stick‐On Labels for Photothermal Manipulation via Marangoni Effect

In this paper, laser‐induced graphene (LIG) tape is reported as stick‐on photothermal labels for developing light‐driven actuators based on the Marangoni effect.

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Fabrication of Large‐area Linear and Nonlinear Surface Ripple Structures on Polystyrene Films

Ripple structures have been used in electronics, optics, magnetics, chemistry, and structural coloration. Commonly used methods for manufacturing large‐area polymeric thin films with ripple structures include mechanical buckling, fracture‐induced structures, and laser induced periodic surface structures.

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Review: Near‐infrared organic photoelectric materials for light‐harvesting systems: Organic photovoltaics and organic photodiodes

The inherent advantages of organic optoelectronic materials endow light‐harvesting systems, including organic photovoltaics and organic photodiodes, with multiple advantages, such as low‐cost manufacturing, light weight, flexibility, and applicability to large‐area fabrication, make them promising competitors with their inorganic counterparts.

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Review: Recent Progress on Advanced Optical Structures for Emerging Photovoltaics and Photodetectors

Herein, the recent progresses in organic‐ and perovskite‐based photovoltaics and photodetectors with integration of judicious optical structure designs are summarized.

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The Link between Ag‐Paste Rheology and Screen‐Printed Solar Cell Metallization

This study presents the impact of Ag‐paste rheology on fine line screen printing for screen openings between 15 and 24 µm at industrial printing speeds of up to 600 mm/s.

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Highly Conductive, Air‐Stable Silver Nanowire@Iongel Composite Films toward Flexible Transparent Electrodes

A new type of flexible transparent electrode is designed, by employing wettability‐induced selective electroless‐welding of silver nanowire (AgNW) networks, together with a thin conductive iongel as the protective layer.

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Improvement of the Electrochemical Behavior of (Sb, Sn, Cu)O Ceramic Electrodes as Electrochemical Advanced Oxidation Anodes

This work explores the possibility of increasing the active surface of a Sb‐doped SnO2 ceramic electrode using CuO as sintering aid, by incorporating petroleum coke as a pore generator.

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Implementation of Flexible Embedded Nanowire Electrodes in Organic Light‐Emitting Diodes

A solution‐based, roll‐to‐roll, and sheet‐to‐sheet scalable process to create indium tin oxide (ITO)‐free FTEs is reported.

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Influence of Amorphous, Carbon‐Derived Wrinkled Surface Topologies on the Colonization of Pseudomonas aeruginosa Bacteria

Here, it is demonstrated that thermal treatment planar thin films of amorphous graphite‐like carbon (G‐aC) coatings deposited on shape memory polystyrene could be used to prepare substratum surfaces with topologies ranging from smooth undulations to those with rough distortion features.

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Wettability modification of zirconia by laser surface texturing and silanization

This paper presents the modification of wettability by nanosecond laser surface textured followed by silanization to fabricate the superhydrophobic zirconia surface. Surface modification by varying the pitch between channels leads to micro‐channel and micro‐grid pattern with different surface roughness.

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A method of assessing the strength of metal surface using film samples on titanium alloy Ti‐1023

A direct method of assessing the surface tensile strength using film samples with thicknesses of approximately 40 μm is proposed in this paper. The immediate objective of this research is to demonstrate the fundamentals of surface strength testing and prove the feasibility of preparing films by tracking the evolution of the surface integrity.

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Surface texture and barrier performance of poly(lactic acid)–cellulose nanocrystal extruded‐cast films

In this study, the influence of cellulose nanocrystal (CNC) addition level (0.5–2 wt %) on the surface texture, thickness, and barrier properties of poly(lactic acid) (PLA) extruded‐cast films was assessed.

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Self‐Supplying Liquidity Oil‐Adsorbed Slippery Smooth Surface for Both Liquid and Solid Repellency

Herein, a smooth slippery liquid‐infused surface with a flat base‐layer is developed as a multifunctional tribosurface, which is termed a friction‐reducing liquidity oil‐adsorbed tribo‐surface.

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Superhydrophobic/oleophobic coatings based on a catalyst driven thiol‐epoxy‐acrylate ternary system

This study presents a facile approach for creating superhydrophobic coatings that are also oleophobic by utilizing spray deposition of polymers mixed with silica particles as an easy and effective route to control the surface roughness of the coatings.

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Micro–Nano‐Texturing Inner Surfaces of Small‐Caliber High Aspect Ratio and Superhydrophobic Artificial Vessels using Femtosecond Laser Filamenting Pulses

A fabrication approach that can produce in situ microstructures on the inner surface of small‐caliber tubules is reported. It is shown that the inner‐surface fabrication with an aspect ratio as high as 10:1 can be achieved and the processed samples exhibit significant changes in physical properties including roughness and hydrophobicity.

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Three‐dimensional reconstructions of solid surfaces using conventional microscopes

The three‐dimensional digital replicas of solid surfaces are subject of interest of different branches of science and technology. The present paper in its introductory parts brings an overview of the various microscopic reconstructive techniques based on optical sectioning.

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A Method to Form Smooth Films of Liquid Metal Supported by Elastomeric Substrate

Several methods are proposed to manipulate and pattern liquid metal films into elastic conductors but all lack precise control over the film thickness and roughness, thereby limiting its uniformity, stability, and reproducibility. Here, an approach relying solely on wetting phenomena is proposed to produce smooth film of liquid gallium (Ga) on extended surface areas with controlled thickness and electrical properties.

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Gecko‐Effect Inspired Soft Gripper with High and Switchable Adhesion for Rough Surfaces

Geckos owe this ability to the hierarchical structures under their toes. These structures are responsible for substantial adhesion and, at the same time, for quick attachment/detachment by mechanical stimulus of toe muscles. Inspired by such stimuli‐responsive systems in nature, an active adhesive soft gripper for rough surfaces is proposed in this study.

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Biomimetic Self‐Cleaning Anisotropic Solid Slippery Surface with Excellent Stability and Restoration

Inspired by solid epicuticular wax on the surface of land plant leaves, a type of biomimetic anisotropic solid slippery surface (ASSS) based on paraffin wax‐incorporated paper with directional micro‐grooves is reported herein. This ASSS material shows anisotropic sliding behavior for liquid droplets with different surface tensions.

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Effect of Volume Fraction of Gradient Nanograined Layer on Low‐Cycle Fatigue Behavior of Cu

Low‐cycle fatigue properties and cyclic behaviors of two pure Cu samples skinned with different volume fractions of gradient nanograined (GNG) layer are investigated under total strain‐amplitude‐controlled fatigue tests.

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Breaking the Limit of Micro‐Ductility in Oxide Glasses

Oxide glasses are one of the most important engineering and functional material families owing to their unique features, such as tailorable physical properties. However, at the same time intrinsic brittleness has been their main drawback, which severely restricts many applications.

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Wetting‐Assisted Crack‐ and Wrinkle‐Free Transfer of Wafer‐Scale Graphene onto Arbitrary Substrates over a Wide Range of Surface Energies

Here, the polymer‐supported wet transfer processes of chemical vapor deposition‐grown graphene are thoroughly examined stage‐by‐stage and it is found that lamination wrinkles are generated as a result of the high contact angles of the trapped transfer medium liquids.

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Advances in 3D Thin‐Film Li‐Ion Batteries

The status and progress toward solid‐state 3D thin‐film Li‐ion microbatteries is reviewed. Planar thin‐film batteries (TFBs) are commercially available. A major issue with planar TFBs, however, is that the total footprint capacity is limited, as only a relatively small electrode volume is available for energy storage.

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Development of flexible Li‐ion batteries for flexible electronics

In this critical review, recent developments of flexible lithium‐ion batteries (FLIBs) for flexible electronic devices are provided. The innovative designs of cell configuration for bendable and stretchable FLIBs, selection of active materials, and evaluation methods for FLIBs are discussed.

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Skin‐Inspired Electronics and Its Applications in Advanced Intelligent Systems

Recent interdisciplinary progress in flexible materials, devices, and system designs has brought about an emerging paradigm of skin‐like multifunctional electronic platforms named skin‐inspired electronics.

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Quantum‐Confined‐Superfluidics‐Enabled Moisture Actuation Based on Unilaterally Structured Graphene Oxide Papers

The strong interaction between graphene oxides (GO) and water molecules has trigged enormous research interest in developing GO‐based separation films, sensors, and actuators. However, sophisticated control over the ultrafast water transmission among the GO sheets and the consequent deformation of the entire GO film is still challenging.

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Flexible electronics based on one‐dimensional and two‐dimensional hybrid nanomaterials

Research on flexible or wearable electronics has been grown remarkably due to the advent of nanomaterials, such as metal nanowires, graphene, or transition metal dichalcogenides.

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Thin Film Adhesion of Flexible Electronics Influenced by Interlayers

With the emergence of flexible electronics in the fields of medical sensors and foldable displays, there is a need to understand the interfacial behavior between active conducting elements and compliant polymer substrates, on which the devices are fabricated.

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Initiated Chemical Vapor Deposition: A Versatile Tool for Various Device Applications

This review describes significant implications of and recent progress made in iCVD‐based technologies in three fields: electronic devices, surface engineering, and biomedical applications.

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Various Techniques for Preparation of Thin‐Film Composite Mixed‐Matrix Membranes for Carbondioxide Separation

A comprehensive review is provided for capturing new details of progress achieved in developing TFC‐MMMs with detailed performance of gas separation in the previous few years.

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Recent Progress in Solution‐Processed Copper‐Chalcogenide Thin‐Film Solar Cells

This Review summarizes the recent progress in solution‐processed Cu chalcogenides for thin‐film solar cells, with emphasis on the precursor solution deposited by spray pyrolysis and spin coating.

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Solution Processable Metal Oxide Thin Film Deposition and Material Growth for Electronic and Photonic Devices

A comprehensive review of recent advances in solution processing and growth of metal‐oxide thin films for electronic and photonic devices is presented.

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Environment‐Dependent Adhesion Energy of Mica Nanolayers Determined by a Nanomanipulation‐Based Bridging Method

In this work, a new delamination method is developed based on the optical microscopic nanomanipulation for measuring the adhesion energy of mica nanolayers.

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Controlling the Thickness of the Surface Oxide Layer on Cu Nanoparticles for the Fabrication of Conductive Structures by Ink‐Jet Printing

With the aim of preparing a high performance conductive ink, the surface chemistry of Cu nanoparticles was controlled so as to minimize surface oxidation.

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A Highly Sensitive Capacitive‐Based Soft Pressure Sensor Based on a Conductive Fabric and a Microporous Dielectric Layer

In this paper, the design and manufacturing of a highly sensitive capacitive‐based soft pressure sensor for wearable electronics applications are presented.

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Strain‐Induced Band‐Gap Tuning of 2D‐SnSSe Flakes for Application in Flexible Sensors

Herein, a ternary SnSSe alloy nanosheet‐based strain sensor is reported showing an enhanced gauge factor (GF) up to 69.7 and a good reproducibility and linearity within strain of 0.9%. Such sensor holds high‐sensitive features under low strain, and demonstrates an improved sensitivity with a decrease in the membrane thickness.

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Printing of µm structures with nano inks using a novel combination of high‐resolution plasma printing and subsequent rotogravure printing

Reel‐to‐reel area‐selective microplasma treatment of polymer films using the plasma printing technique in combination with subsequent rotogravure printing was investigated.

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The influence of substrate surface roughness on microstrip transmission line loss using conventional analyses and length‐scale fractal analysis

Two components of conductor topography can impact conductor loss for signals in the GHz frequency range: conductor–ceramic interface roughness and conductor edge angle.

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Size‐Scalable and High‐Density Liquid‐Metal‐Based Soft Electronic Passive Components and Circuits Using Soft Lithography

The use of conducting liquids with high electrical conductivity, such as eutectic gallium–indium (EGaIn), has great potential in electronics applications requiring stretchability and deformability beyond conventional flexible electronics relying on solid conductors.

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Spatially Confining Surface Roughness on Exponentially Growing Polyelectrolyte Multilayer Films

Introducing roughness features onto materials' surface can serve as an efficient strategy for novel or enhanced surface functionality. Surface roughness can be developed spontaneously on exponentially growing polyelectrolyte multilayer films without any postassembly treatment.

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Recent Progress in Inkjet‐Printed Thin‐Film Transistors

In this review article, recent progress in printing‐based thin‐film transistors is presented from materials to applications.

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Flexible Micropillar Electrode Arrays for In Vivo Neural Activity Recordings

Here, the facile fabrication of a novel flexible micropillar electrode array (µPEA) is described based on a biotemplate method. The flexible and compliant µPEA can readily integrate with the soft surface of a rat cerebral cortex.

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Crack Control in Biotemplated Gold Films for Wide‐Range, Highly Sensitive Strain Sensing

In the design of strain sensors, there is usually a trade‐off between sensitivity and sensing range. Herein, a crack‐based strain sensor with engineered microstructure is facilely prepared through a biotemplating method.

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Photopolymerizable gelatin and hyaluronic acid for stereolithographic 3D bioprinting of tissue‐engineered cartilage

To create artificial cartilage in vitro, mimicking the function of native extracellular matrix (ECM) and morphological cartilage‐like shape is essential.

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3D Printing of Polymer Nanocomposites via Stereolithography

This review discusses the application of SLA for polymer nanocomposites fabrication to show the technology's potential in increasing the applicability of current SLA‐printed parts.

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Additive Manufacturing: Unlocking the Evolution of Energy Materials

This comprehensive review will fill the gap in communicating on recent breakthroughs in additive manufacturing for energy material and device applications. It will underpin the discoveries on what 3D functional energy structures can be created without design constraints.

Additive Manufacturing of Titanium Alloys by Electron Beam Melting

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