scholarly journals Flexible Electronics: Flexible Electrochemical Bioelectronics: The Rise of In Situ Bioanalysis (Adv. Mater. 15/2020)

2020 ◽  
Vol 32 (15) ◽  
pp. 2070115 ◽  
Author(s):  
You Yu ◽  
Hnin Yin Yin Nyein ◽  
Wei Gao ◽  
Ali Javey
Keyword(s):  
Flexible Electronics

Recyclable conductive nanoclay for direct in situ printing flexible electronics

2021 ◽  
Author(s):  
Pengcheng Wu ◽  
Zhenwei Wang ◽  
Xinhua Yao ◽  
Jianzhong Fu ◽  
Yong He
Keyword(s):  
Flexible Electronics ◽  
Self Healing ◽  
Stamping Process

A recyclable, self-healing conductive nanoclay and corresponding stamping process are developed for printing flexible electronics directly and quickly in situ.

Real Area of Contact in a Soft Transparent Interface by Particle Exclusion Microscopy

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
Kyle D. Schulze ◽  
Alex I. Bennett ◽  
Samantha Marshall ◽  
Kyle G. Rowe ◽  
Alison C. Dunn
Keyword(s):  
Flexible Electronics ◽  
Soft Matter ◽  
Colloidal Particles ◽  
Contact Region ◽  
Real Contact Area ◽  
The Real ◽  
Real Area Of Contact ◽  
Static Indentation ◽  
Real Area

Soft matter mechanics are characterized by high strains and time-dependent elastic properties, which complicate contact mechanics for emerging applications in biomedical surfaces and flexible electronics. In addition, hydrated soft matter precludes using interferometry to observe real areas of contact. In this work, we present a method for measuring the real area of contact in a soft, hydrated, and transparent interface by excluding colloidal particles from the contact region. We confirm the technique by presenting a Hertz-like quasi-static indentation (loading time > 1.4 hrs) by a polyacrylamide probe into a stiff flat surface in a submerged environment. The real contact area and width were calculated from in situ images of the interface processed to reduce image noise and thresholded to define the perimeter of contact. This simple technique of in situ particle exclusion microscopy (PEM) may be widely applicable for determining real areas of contact of soft, transparent interfaces.

In Situ Growth of Silver Film on Polyimide with Tuned Morphologies for Flexible Electronics

Langmuir ◽  
2021 ◽  
Author(s):  
Rui Liu ◽  
Ke Wang ◽  
Zhangming Liu ◽  
Yuan Xu ◽  
Qi Wang ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Silver Film ◽  
In Situ Growth

scholarly journals In Situ Testing of Flexible Electronics

2017 ◽  
Vol 12 (2) ◽  
pp. 34-36
Author(s):  
Dario Gastaldi
Keyword(s):  
Flexible Electronics ◽  
In Situ Testing

scholarly journals In situ mechanical characterization of silver nanowire/graphene hybrids films for flexible electronics

2020 ◽  
Vol 11 (3) ◽  
pp. 265-276
Author(s):  
Ke Cao ◽  
Haokun Yang ◽  
Libo Gao ◽  
Ying Han ◽  
Jingyao Feng ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Mechanical Characterization ◽  
Silver Nanowire

scholarly journals Flexible Bandpass Filter Fabricated on Polyimide Substrate by Surface Modification and In Situ Self-Metallization Technique

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2068 ◽  
Author(s):  
Huiwen Qu ◽  
Zhiliang Wang ◽  
Dingyong Cang
Keyword(s):  
Surface Modification ◽  
Flexible Electronics ◽  
Room Temperature ◽  
Bandpass Filter ◽  
Flexible Substrate ◽  
Substrate Material ◽  
Fractional Bandwidth ◽  
Good Adhesion ◽  
Alternative Approach

Polymer, especially polyimide (PI), is the best suitable substrate material for the design of flexible electronics. The compact silver can be reduced on the surface of PI films by surface modification and in situ self-metallization technique. The formed silver layers have good electrical and mechanical flexibility. A flexible bandpass filter on a PI flexible substrate by surface modification and in situ self-metallization technique at room temperature are presented in this work. Measured results show that the proposed flexible bandpass filter could achieve a fractional bandwidth of 80.8% with an insertion loss (IL) of less than 0.6 dB. The performance of the designed filter is almost constant under different bending, folding, and rolling conditions. The formed silver layers also present good adhesion with PI substrates. This technology provides an alternative approach for manufacturing flexible filters without high-temperature thermal annealing, costly equipment, and vacuum conditions.

scholarly journals Phase transition enhanced superior elasticity in freestanding single-crystalline multiferroic BiFeO3 membranes

2020 ◽  
Vol 6 (34) ◽  
pp. eaba5847
Author(s):  
Bin Peng ◽  
Ren-Ci Peng ◽  
Yong-Qiang Zhang ◽  
Guohua Dong ◽  
Ziyao Zhou ◽  
...  
Keyword(s):  
Phase Transition ◽  
Flexible Electronics ◽  
Smart Materials ◽  
Metallic Materials ◽  
Single Crystalline ◽  
Bending Strain ◽  
Multiferroic Bifeo3 ◽  
High Flexibility ◽  
Tetragonal Phase Transition

The integration of ferroic oxide thin films into advanced flexible electronics will bring multifunctionality beyond organic and metallic materials. However, it is challenging to achieve high flexibility in single-crystalline ferroic oxides that is considerable to organic or metallic materials. Here, we demonstrate the superior flexibility of freestanding single-crystalline BiFeO3 membranes, which are typical multiferroic materials with multifunctionality. They can endure cyclic 180° folding and have good recoverability, with the maximum bending strain up to 5.42% during in situ bending under scanning electron microscopy, far beyond their bulk counterparts. Such superior elasticity mainly originates from reversible rhombohedral-tetragonal phase transition, as revealed by phase-field simulations. This study suggests a general fundamental mechanism for a variety of ferroic oxides to achieve high flexibility and to work as smart materials in flexible electronics.

scholarly journals Green Synthesis of Free Standing Cellulose/Graphene Oxide/Polyaniline Aerogel Electrode for High Performance Flexible All-solid-state Supercapacitors

2020 ◽  
Author(s):  
Yueqin Li ◽  
Zongbiao Xia ◽  
Qiang Gong ◽  
Xiaohui Liu ◽  
Yong Yang ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
High Performance ◽  
In Situ Polymerization ◽  
Lithium Bromide ◽  
Three Dimensional ◽  
Weight Ratio ◽  
Porous Structures ◽  
Free Standing ◽  
Symmetric Configuration

The cellulose/GO networks as the scaffold of free-standing aerogel electrodes are developed by using lithium bromide aqueous solution as the solvent to ensure the complete dissolution of cotton linter pulp and well dispersion/reduction of GO nanosheets. PANI nanoclusters are then coated onto cellulose/GO networks via in-situ polymerization of aniline monomers. By optimized weight ratio of GO and PANI, the ternary cellulose/GO3.5/PANI aerogel film exhibits well-defined three-dimensional porous structures and high conductivity of 1.15 S/cm that contributes to its high areal specific capacitance of 1218 mF/cm2 at the current density of 1.0 mA/cm2. Utilizing this cellulose/GO3.5/PANI aerogel film as electrodes in a symmetric configuration supercapacitor can result in an outstanding energy density as high as 258.2 μWh/cm2 at a power density of 1201.4 μW/cm2. Moreover, the device can maintain nearly constant capacitance under different bending deformations, suggesting its promising applications in flexible electronics.

scholarly journals A one-pot in-situ synthesis of copper cluster doped hydrogen substituted graphdiyne nanofibers (Cu-HsGDY)

2021 ◽  
Vol 261 ◽  
pp. 02055
Author(s):  
Wenjun Hao ◽  
Lei Jin ◽  
Rong Fan ◽  
Xinyu Su ◽  
Zongping Chen
Keyword(s):  
Flexible Electronics ◽  
Coupling Reaction ◽  
Similar Process ◽  
Stable Configuration ◽  
Synthetic Approach ◽  
Copper Cluster ◽  
One Pot ◽  
Cross Coupling Reaction ◽  
New Type

Graphdiyne (GDY) is a new type of two-dimensional (2D) carbon materials, in which two benzene rings are chained by diacetylenic linkages (-C≡C-C≡C-). γ-GDY is the most studied GDY due to its stable configuration and was experimentally obtained in 2010 through cross coupling reaction by using hexaethynylbenzene as precursor. Hydrogen substituted graphdiyne (HsGDY) was obtained using 1, 3, 5-triethynylbenzene as precursor in a similar process. Hereinto, a copper cluster doped hydrogen substituted graphdiyne nanofibers (Cu-HsGDY) were prepared through a facile one-pot in-situ synthetic approach in a good reproductive manner. Through simply removing the copper foil, the obtained robust Cu-HsGDY can be transferred onto arbitrary substrates, especially flexible substrates, such as polyethylene terephthalate (PET), which can be used as flexible electronics as future materials.

scholarly journals Morphological Hydrogel Microfibers with MXene Encapsulation for Electronic Skin

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Jiahui Guo ◽  
Yunru Yu ◽  
Dagan Zhang ◽  
Han Zhang ◽  
Yuanjin Zhao
Keyword(s):  
Calcium Ions ◽  
Microfluidic Chip ◽  
Flexible Electronics ◽  
Glass Capillary ◽  
Flow Rates ◽  
Distinctive Features ◽  
Electronic Skin ◽  
Conductive Hydrogel

Electronic skins with distinctive features have attracted remarkable attention from researchers because of their promising applications in flexible electronics. Here, we present novel morphologically conductive hydrogel microfibers with MXene encapsulation by using a multi-injection coflow glass capillary microfluidic chip. The coaxial flows in microchannels together with fast gelation between alginate and calcium ions ensure the formation of hollow straight as well as helical microfibers and guarantee the in situ encapsulation of MXene. The resultant hollow straight and helical MXene hydrogel microfibers were with highly controllable morphologies and package features. Benefiting from the easy manipulation of the microfluidics, the structure compositions and the sizes of MXene hydrogel microfibers could be easily tailored by varying different flow rates. It was demonstrated that these morphologically conductive MXene hydrogel microfibers were with outstanding capabilities of sensitive responses to motion and photothermal stimulations, according to their corresponding resistance changes. Thus, we believe that our morphologically conductive MXene hydrogel microfibers with these excellent features will find important applications in smart flexible electronics especially electronic skins.

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