A high-resolution, ultrabroad-range and sensitive capacitive tactile sensor based on a CNT/PDMS composite for robotic hands

Abstract

Tactile sensors are of great significance for robotic perception improvement to realize stable object manipulation and accurate object identification. To date, it remains a critical challenge to develop a broad-range...

Super-strong CNT composite yarn with tight CNT packing via a compress-stretch process

“…CNT yarn is a one-dimensional, high bulk CNT assembly composed of CNT bundles and threads with a porous and hierarchical structure. Due to the excellent strength (∼100 GPa), large elastic modulus (∼1 TPa), and high conductivity (2 × 10 7 S m −1 ) of CNTs, the macro-scale CNT assemblies of a CNT yarn attracts tremendous attention, such as in wearable electronic textiles, [1][2][3] advanced materials, 4 energy storage, 5,6 nanotechnology. 7,8 In the past, various promising post-treatment methods have been used to improve the mechanical and electrical properties of CNT yarn.…”

Flexible Capacitive Pressure Sensor Based on Microstructured Composite Dielectric Layer for Broad Linear Range Pressure Sensing Applications

“…In consequence, the detection range of these highly sensitive capacitive pressure sensors with surface or embedded microstructures is still limited (<10 kPa) and should be further expanded. We have to underline that the employed dielectric composite, which possesses a relatively inherent superior dielectric constant than the conventional pure polymer dielectric materials, should be a promising choice in the development of the next generation of flexible capacitive pressure sensor with both high sensitivity and broad detection range [20][21][22][23][24][25][26][27][28]. For instance, Zhou et al [22] developed a capacitive pressure sensor by utilizing a carbonyl iron particles/polydimethylsiloxane (CIP/PDMS)-based hair-like micro cilia array as a dielectric layer.…”

“…Consequently, it is of great significance to come up with an environmentally friendly preparation method such as planetary mixing [2,19] or three-roll milling [7] for the polymer-based dielectric composite. In addition, carbon black (CB) and carbon nanotubes (CNTs) are ideal candidate materials to enhance the dielectric property of the PDMS due to their high aspect ratio and high dielectric constant [20,28]; thus, both these two nanofillers should be selected in preparing the dielectric composite to reduce the agglomeration of each single kind of nanofiller and increase the dispersion effect.…”

Fabrication and Characterization of a Highly Sensitive and Flexible Tactile Sensor Based on Indium Zinc Oxide (IZO) with Imprecise Data Analysis

“…The tactile sensor senses the externally applied mechanical force’s position and time and strength in the resolution of micron levels through the processing technology and produces useful data. 4 There are various sensing approaches used for developing tactile sensors such as capacitive type, 5 resistive type, 6 surface acoustic wave (SAW) type, 7 and optical using infrared (IR). 8 Numerous materials have been used in the fabrication of tactile sensors.…”