Flexible Substrate Based Few Layer MoS2 Electrode for Passive Electronic Devices and Interactive Frequency Modulation Based on Human Motion

2018 ◽  
Vol 17 (2) ◽  
pp. 338-344 ◽  
Author(s):  
Parikshit Sahatiya ◽  
Chepuri Madhava ◽  
Akash Shinde ◽  
Sushmee Badhulika
Keyword(s):  
Frequency Modulation ◽  
Flexible Substrate ◽  
Electronic Devices ◽  
Human Motion

Interconnects for Elastically Stretchable and Deformable Electronic Surfaces

2005 ◽  
Vol 863 ◽  
Author(s):  
Joyelle Jones ◽  
S.P. Lacour ◽  
Sigurd Wagner
Keyword(s):  
Electrical Resistance ◽  
Tensile Strain ◽  
Flexible Substrate ◽  
Electronic Devices ◽  
Electrical Performance ◽  
Shadow Mask ◽  
Large Area ◽  
Electrically Conductive ◽  
Human Machine Interfaces ◽  
Stretchable Interconnects

AbstractDeformable, large-area electronic surfaces are desirable for many human-machine interfaces. The goal of our research is to fabricate elastically deformable electronics by integrating electronic devices and stretchable interconnects onto a flexible substrate. The focus of this paper is the fabrication and electrical performance of the stretchable interconnects. Au was deposited onto a silicone elastomer (PDMS) and patterned to achieve a resolution of 2 μm. Two patterning techniques are presented: patterning by shadow mask and patterning by photolithography. Photolithographic patterning on PDMS is not straightforward. First, we discuss the challenges in patterning and then the morphology of lines patterned by both techniques. The electrical resistance of the Au lines under tensile strain is presented. Interconnects patterned by shadow mask remain electrically conductive up to 100 % strain. Those patterned by photolithography maintain electrical conductivity when strained up to 60 %.

High Temperature Processable Flexible Polymer Films

2016 ◽  
Vol 16 (03) ◽  
pp. 1650038
Author(s):  
D. Shanmuga Sundar ◽  
A. Sivanantha Raja ◽  
C. Sanjeeviraja ◽  
D. Jeyakumar
Keyword(s):  
Flexible Electronics ◽  
Flexible Substrate ◽  
Electronic Devices ◽  
Visible Region ◽  
Thermal Characteristics ◽  
Index Formula ◽  
Flexible Substrates ◽  
Transparent Substrate ◽  
Flexible Polymer ◽  
Recent Developments

Recent developments in the field of flexible electronics motivated the researchers to start working in verdict of new flexible substrate for replacing the existing rigid glass and flexible plastics. Flexible substrates offer significant rewards in terms of being able to fabricate flexible electronic devices that are robust, thinner, conformable, lighter and can be rolled away when needed. In this work, a new flexible and transparent substrate with the help of organic materials such as Polydimethylsiloxane (PDMS) and tetra ethoxy orthosilicate (TEOS) is synthesized. Transmittance of about 90–95% is acquired in the visible region (400–700[Formula: see text]nm) and the synthesized substrate shows better thermal characteristics and withstands temperature up to 200[Formula: see text]C without any significant degradation. Characteristics such as transmittance ([Formula: see text]), absorption ([Formula: see text]), reflectance ([Formula: see text]), refractive index ([Formula: see text]) and extinction coefficient ([Formula: see text]) are also reported.

scholarly journals High performance p-channel transistors on flexible substrate using direct roll transfer stamping

2021 ◽  
Author(s):  
Ayoub Abdulhafith Sadek Zumeit ◽  
Abhishek S Dahiya ◽  
Adamos Christou ◽  
Ravinder Dahiya
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Field Effect Transistors ◽  
Flexible Substrate ◽  
Electronic Devices ◽  
Silicon On Insulator ◽  
Flexible Substrates ◽  
Device Performance ◽  
Mechanical Bending ◽  
P Type

Abstract lexible electronics with high-performance devices is crucial for transformative advances in several emerging and traditional applications. To address this need, herein we present p-type silicon (Si) nanoribbons (NR)-based high-performance field-effect transistors (FETs) developed using innovative Direct Roll Transfer Stamping (DRTS) process. First, ultrathin Si NRs (~70 nm) are obtained from silicon on insulator (SOI) wafers using conventional top-down method, and then DRTS method is employed to directly place the NRs onto flexible substrates at room temperature (RT). The NRFETs are then developed following RT fabrication process which include deposition of high-quality SiNx dielectric. The fabricated p-channel transistors demonstrate high linear mobility ~100±10 cm2/Vs, current on/off ratio >10^4, and low gate leakage (<1nA). Further, the transistors showed robust device performance under mechanical bending and at wide temperature range (15 to 90 °C), showing excellent potential for futuristic high-performance flexible electronic devices/circuits.

scholarly journals Fabrication of circuits by multi-nozzle electrohydrodynamic inkjet printing for soft wearable electronics

2021 ◽  
Author(s):  
Arshad Khan ◽  
Khalid Rahman ◽  
Shawkat Ali ◽  
Saleem Khan ◽  
Bo Wang ◽  
...  
Keyword(s):  
Inkjet Printing ◽  
Mechanical Stability ◽  
Thermoplastic Polyurethane ◽  
Electronic Devices ◽  
Human Motion ◽  
Wearable Electronics ◽  
Counter Electrodes ◽  
Electric Circuits ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

Abstract Wearable electronic devices are evolving from current rigid configurations to flexible and ultimately stretchable structures. These emerging systems require soft circuits for connecting the various working units of the overall system. This paper presents fabrication of soft circuits by electrohydrodynamic (EHD) inkjet-printing technique. Multi-nozzle EHD printing head is employed for rapid fabrication of electric circuits on a wide set of materials, including glass substrate (rigid), flexible polyethylene terephthalate (PET) films, and stretchable thermoplastic polyurethane (TPU) films. To avoid the effects of substrate materials on the jettability, the proposed multi-nozzle head is equipped with integrated individual counter electrodes (electrodes are placed above the printing substrate). High-resolution circuits (50 ± 5 µm) with high electrical conductivity (0.6 Ω □−1) on soft substrate materials validate our well-controlled multi-nozzle EHD printing approach. The produced circuits showed excellent flexibility (bending radius ≈ 5 mm radius), high stretchability (strain ≈ 100%), and long-term mechanical stability (500 cycles at 30% strain). The concept is further demonstrated with a soft strain sensor based on a multi-nozzle EHD-printed circuit, employed for monitoring the human motion (finger bending), indicating the potential applications of these circuits in soft wearable electronic devices. Graphic Abstract

scholarly journals 3-D Printing of Flexible Two Terminal Electronic Memory Devices

MRS Advances ◽  
2018 ◽  
Vol 3 (28) ◽  
pp. 1603-1608
Author(s):  
Salah Maswoud ◽  
Shashi Paul ◽  
Iulia Salaoru
Keyword(s):  
Inkjet Printing ◽  
Material Selection ◽  
Flexible Substrate ◽  
Electronic Devices ◽  
Information Storage ◽  
Manufacturing Cost ◽  
Memory Devices ◽  
Memory Cells ◽  
Printing Technology ◽  
Inkjet Printing Technology

AbstractRecent strategy in the electronics sector is to ascertain the ways to make cheap, flexible and environmentally friendly electronic devices. The 3D inkjet printing technology is based on the Additive Manufacturing concept and it is with no doubt capable of revolutionising the whole system of manufacturing electronic devices including: material selection; design and fabrication steps and device configuration and architecture. Thus, 3D inkjet printing technology (IJP) is not only one of the most promising technologies to reduce the harmful radiation/ heat generation but also achieve reductions in manufacturing cost. Here, we explore the potential of 3D – inkjet printing technology to provide an innovative approach for electronic devices in especially information storage elements by seeking to manufacture and characterise state-of-art fully inkjet printed two terminal electronic memory devices. In this work, ink-jettable materials (Ag and PEDOT:PSS) were printed by a piezoelectric Epson Stylus P50 inkjet printing machine on a flexible substrate. All components of the memory cells of a simple metal/active layer/metal structure were deposited via inkjet printing. The quality of the printed layers was first assessed by Nikon LABOPHOT-2 optical microscope, fitted with Nikon Camera DS-Fi1. Furthermore, an in-depth electrical characterisation of the fabricated memory cells was carried out using HP4140B picoammeter.

scholarly journals Human Motion State Recognition Based on Flexible, Wearable Capacitive Pressure Sensors

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1219
Author(s):  
Qingyang Yu ◽  
Peng Zhang ◽  
Yucheng Chen
Keyword(s):  
Flexible Substrate ◽  
Recognition Rate ◽  
Pressure Sensors ◽  
Recognition System ◽  
Human Motion ◽  
Body Motion ◽  
Capacitive Pressure Sensor ◽  
Wearable Sensor ◽  
State Recognition ◽  
Motion State

Human motion state recognition technology based on flexible, wearable sensor devices has been widely applied in the fields of human–computer interaction and health monitoring. In this study, a new type of flexible capacitive pressure sensor is designed and applied to the recognition of human motion state. The electrode layers use multi-walled carbon nanotubes (MWCNTs) as conductive materials, and polydimethylsiloxane (PDMS) with microstructures is embedded in the surface as a flexible substrate. A composite film of barium titanate (BaTiO3) with a high dielectric constant and low dielectric loss and PDMS is used as the intermediate dielectric layer. The sensor has the advantages of high sensitivity (2.39 kPa−1), wide pressure range (0–120 kPa), low pressure resolution (6.8 Pa), fast response time (16 ms), fast recovery time (8 ms), lower hysteresis, and stability. The human body motion state recognition system is designed based on a multi-layer back propagation neural network, which can collect, process, and recognize the sensor signals of different motion states (sitting, standing, walking, and running). The results indicate that the overall recognition rate of the system for the human motion state reaches 94%. This proves the feasibility of the human motion state recognition system based on the flexible wearable sensor. Furthermore, the system has high application potential in the field of wearable motion detection.

Research on Printed Conductive Silver Layer based on Inkjet Photo Paper

2021 ◽  
Author(s):  
Yi Fang ◽  
Lixin Mo ◽  
Zhiqing Xin ◽  
Yinjie Chen ◽  
Xiu Li ◽  
...  
Keyword(s):  
High Performance ◽  
Laser Scanning ◽  
Low Cost ◽  
Flexible Substrate ◽  
Electronic Devices ◽  
Laser Scanning Microscopy ◽  
Silver Layer ◽  
Confocal Laser ◽  
Nano Silver ◽  
Silver Ink

Printed electronics is an emerging technology that applies traditional printing or coating processes to the manufacture of electronic devices and products. In order to find a low-cost, high-performance, environmentally-friendly flexible substrate suitable for electronic devices, the printability between four kinds of inkjet photo papers and nano-silver ink was investigated. First, different surface morphologies of the inkjet photo papers were measured by a confocal laser scanning microscopy. Then, a pen and a gravure printer were used to test the printability between photo papers and nano-silver ink. It was found that the conductive track and pattern was influenced by the surface morphology of the photo papers. Furthermore, a four-probe test showed that the conductivity of the ink layers on the four photo papers was almost at the same level. Furthermore, a tearing test with 3 M tapes showed that the silk photo paper had the best tearing resistance. In general, silk photo paper has the best overall performance. This research could be beneficial for the development of flexible electronic devices which are low-cost, mass manufacture suitable and environment friendly.

Application of flexible friction nano-generator in human motion information acquisition

2021 ◽  
pp. 1-13
Author(s):  
Leilei Tian ◽  
Cunjun Xie ◽  
Ying Jin
Keyword(s):  
Information Acquisition ◽  
Short Circuit ◽  
Electronic Devices ◽  
Short Circuit Current ◽  
Human Motion ◽  
Open Circuit ◽  
Motion Information ◽  
Negative Materials ◽  
Wearable Electronic ◽  
Wearable Electronic Devices

Under the background of the wide application of intelligent wearable devices, the application of flexible friction nanogenerator in human motion information acquisition is studied. According to the actual needs of energy supply of wearable electronic devices and human motion information acquisition, a flexible friction nanogenerator was prepared by using polyester fiber nickel plated conductive cloth and room temperature vulcanized silica gel polymer as friction positive and negative materials for human motion information acquisition. Set relevant parameters for test. The output peaks of short-circuit current and open circuit voltage are 5 respectively μA and 50 V. The test shows that the output energy can drive the calculator and digital clock to work in real time, and can realize the collection of human motion information.

Arm Motion Dynamics to Excite a Mobile Energy Harvesting Autowinder

2020 ◽  
Author(s):  
Abby George ◽  
David Moline ◽  
John Wagner
Keyword(s):  
Energy Harvesting ◽  
Energy Harvester ◽  
Electronic Devices ◽  
Human Motion ◽  
Gear Train ◽  
Future Research ◽  
System Response ◽  
Battery Life ◽  
Arm Motion ◽  
Motion Dynamics

Abstract A mobile energy harvester device based on the inertial automatic winding mechanism found in watches is explored. Through normal human motion during walking and running, the arm travels a spatial path that can potentially be used for energy harvesting. The conceptual harvester consists of a rotary pendulum coupled to a small generator through a step-up gear train. The generator’s electrical output may be stored and utilized as a power source for portable electronic devices that require a smaller amount of power for operation. In this paper, the equations of motion governing the human arm motion dynamics and harvester pendulum excitation are fully derived. Two cases of human walking and running are considered to analyze the system response. A series of representative simulation studies have been conducted for representative arm motion to determine the potential energy. The energy available for harvesting was greater in the case of the human subject running at 2.06 mJ, while when walking it offered an output of 0.42 mJ for a 5 second time period. The two numerical results serve as a basis for building a mobile energy harvester for future research into a renewable device that can be used by humans to augment battery life for portable electronic devices.

Sign in / Sign up

Export Citation Format

Share Document