Abstract Flexible electronics has significantly advanced over the last few years, as devices and circuits from nanoscale structures to printed thin films have started appear. Simultaneously, demand for high-performance also increased because flexible compact integrated are needed obtain fully electronic systems. It is challenging silicon based CMOS electronics, which currently industry standard high-performance, planar brittle nature of makes bendability difficult. For this reason,...

Tactile or electronic skin is needed to provide critical haptic perception robots and amputees, as well in wearable electronics for health monitoring wellness applications. Energy autonomy of a feature that would enable better portability longer operation times. This study shows novel structure, consisting transparent tactile sensitive layer based on single‐layer graphene, photovoltaic cell underneath building block energy‐autonomous, flexible, skin. Transparency the touch considered key...

Flexible electronics has huge potential to bring revolution in robotics and prosthetics as well about the next big evolution industry. In related applications, it is expected revolutionise way with which machines interact humans, real-world objects environment. For example, conformable electronic or tactile skin on robot's body, enabled by advances flexible electronics, will allow safe robotic interaction during physical contact of robot various objects. Developing a conformable, bendable...

Inspired by the structure and functions of human skin, a highly sensitive capacitive‐piezoelectric flexible sensing skin with fingerprint‐like patterns to detect discriminate between spatiotemporal tactile stimuli including static dynamic pressures textures is presented. The tandem embedded in phalange 3D‐printed robotic hand, tempotron classifier system used for exploration. sensor, interfaced an extended gate configuration common source metal oxide semiconductor field effect transistor...

Herein, the development of complex 3D intelligent structures such as robotic hands using innovative designs and multimaterial additive manufacturing technology is presented. The distal phalanges printed hand presented herein have inherent soft capacitive touch or pressure sensors embedded electronics. Materials thermoplastic polyurethane (TPU), silver paint, conductive polylactic acid composite, graphite ink, etc. are explored to develop five different variants a modified printer, which...

This paper presents novel Neural Nanowire Field Effect Transistors (υ-NWFETs) based hardware-implementable neural network (HNN) approach for tactile data processing in electronic skin (e-skin). The viability of Si nanowires (NWs) as the active material υ-NWFETs HNN is explored through modeling and demonstrated by fabricating first device. Using to realize HNNs an interesting printing NWs on large area flexible substrates it will be possible develop a bendable with distributed elements (for...

This paper presents graphene field-effect transistor (GFET) based pressure sensors for tactile sensing. The sensing device comprises GFET connected with a piezoelectric metal-insulator-metal (MIM) capacitor in an extended gate configuration. application of on MIM generates piezo-potential which modulates the channel current GFET. fabricated sensor was tested over range 23.54–94.18 kPa, and it exhibits sensitivity 4.55 × 10−3 kPa−1. Further, low voltage (∼100 mV) operation presented makes...

Abstract Energy autonomy is critical for wearable and portable systems to this end storage devices with high‐energy density are needed. This work presents flexible supercapacitors (SCs), showing three times the energy than similar type of SCs reported in literature. The graphene–graphite polyurethane (GPU) composite based have maximum power densities 10.22 µWh cm −2 11.15 mW , respectively, at a current 10 mA operating voltage 2.25 V (considering IR drop). significant gain performance due...

This work reports a temperature-assisted dip-coating method for self-assembly of silica (SiO2) microspheres/nanospheres (SPs) as monolayers over large areas (∼cm2). The area which self-assembled (SAMs) are formed can be controlled by tuning the suspension temperature (Ts), allows precise control meniscus shape. Furthermore, formation periodic stripes SAMs, with excellent dimensional (stripe width and stripe-to-stripe spacing), is demonstrated using suitable set parameters. These findings...

This paper presents a flexible ultraviolet (UV) photodetector (PD) system based on zinc oxide (ZnO) nanowires (NWs) for wearable UV dosimetry. High-crystal quality ZnO NWs have been synthesized by chemical vapour transport technique c-plane sapphire substrates, and thereafter, transferred aligned at pre-defined locations substrate using dielectrophoresis (DEP). The accurate control over DEP parameters permitted the fabrication of large-area (wafer scale) arrays NWs-based PDs. Resulting PDs...

In this work, we have developed a contact-printing system to efficiently transfer the bottom-up and top-down semiconductor nanowires (NWs), preserving their as-grown features with good control over electronic properties. close-loop configuration, printing is controlled parameters such as contact pressure sliding speed/stroke. Combined dry pre-treatment of receiver substrate, prints layers high NW density (7 NWs/μm for ZnO 3 Si NWs), yield reproducibility. We observed compactly packed (~115...

Electronic skin (eSkin) with various types of sensors over large conformable substrates has received considerable interest in robotics. The continuous operation number and the readout electronics make it challenging to meet energy requirements eSkin. In this article, we present first generating eSkin intrinsic tactile sensing without any touch sensor. comprises a distributed array miniaturized solar cells infrared light emitting diodes (IRLEDs) on soft elastomeric substrate. By innovatively...

Abstract This paper presents an innovative approach for wafer scale transfer of ultrathin silicon chips on flexible substrates. The methodology is demonstrated with various devices (ultrathin chip resistive samples, metal oxide semiconductor (MOS) capacitors and n‐channel field effect transistors (MOSFETs)) wafers up to 4″ diameter. supported by extensive electromechanical characterization theoretical analysis, including finite element simulation, evaluate the bending critical breaking...

Graphene has great potential for high-performance flexible electronics. Although studied more than a decade, contacting graphene efficiently, especially large-area, electronics, is still challenge. Here, by engineering the graphene-metal van der Waals (vdW) contact, we demonstrate that ultralow contact resistance achievable via bottom-contact strategy incorporating simple transfer process without any harsh thermal treatment (>150 °C). The majority of fabricated devices show resistances below...

This paper presents a dual-function wearable device (Tacsac) with capacitive tactile sensing and integrated feedback capability to enable communication among deafblind people. Tacsac has skin contactor which enhances localized vibrotactile stimulation of the as means user. It comprises two main modules-the touch-sensing module module; both stacked single device. The is an electromagnetic actuator that employs flexible coil permanent magnet assembled in soft poly (dimethylsiloxane) (PDMS),...

Although the concept may seem futuristic, research on electronic skin has wide‐ranging practical impact.

This work reports the growth kinetics of amorphous nanowires (NWs) developed by vapour-liquid-solid (VLS) mechanism. The model presented here incorporates all atomistic processes contributing to oxide NWs having diameters in 5-100 nm range. steady state condition has been described balancing key process steps. It is found that 2D nano-catalyst liquid and NW solid (L-S) interface plays a central role kinetic analysis. balance between Si layer crystallization oxidation rate quantitatively...

Abstract Si‐nanoribbon‐based high‐performance field‐effect transistors (FETs) with room temperature (RT)‐deposited dielectric are presented. The distinct feature of these devices is that the high‐quality SiN x deposition at RT, directly on transfer‐printed nanoribbons, compatible most flexible substrates. performance FETs (mobility ≈656 cm 2 V −1 s and on/off ratio >10 6 ) par highest similar reported high‐temperature processes, significantly higher than low‐temperature processes....

This paper presents a novel additive manufacturing method to obtain bendable smart sensing structures having printed strain sensors and interconnects gain access embedded electronic components. The presented structure is obtained by simultaneous printing of functional materials along with conventional polymer-based 3D materials. To this end, low-cost open-source printer was augmented silver palladium metallic paste extruder. in the are particularly useful for wearable motion applications...

This paper presents a multisensory glove to allow prosthetic and robotic hand simultaneously feel the pressure, temperature, humidity. The low-cost implementation of flexible with multiple sensors presented here will enable gathering tactile information from grasped objects. off-the-shelf components such as temperature humidity have been mounted on printed circuit (FPC) board attached glove. During validation most were in contact objects successfully measured various parameters.

Herein, the design and implementation of a transparent 3D touch‐enabled surface for richer user interaction with midair virtual objects in touch‐interactive pseudo‐holographic display are presented. Frustrated total internal reflection (FTIR)‐based touch sensing is used combination four‐sided pyramidal projection. The developed system allows gesture‐based control smooth through facile inexpensive hardware open‐source software tools. A application also as interface between...

Tactile feedback is important to enhance the ability of amputees interact with various objects. In this regard, paper presents a 3D-printed prosthetic limb integrated biomimetic tactile sensors coupled actuation mechanism which myo-electric band on residual limb. The static and dynamic hand were realized by using capacitive architecture in tandem piezoelectric structure. sensing structure exhibited non-linear characteristics varying sensitivities 0.25 kPa <sup...

A novel scheme to control upper-limb prosthesis with toe gesture sensing system is presented in this paper. In the proposed system, copper/polymer stack capacitive touch sensors fabricated on a flexible substrate, interfaced electronics and wireless transmitters forms smart insole. The takes advantage of user making various gestures their left right hallux digits form Morse code. results change capacitance from 56 ±2 pF 75±3 pF, which readout by an interface circuitry. This transmitted...