Comparison of Piezo Resistive Property of Graphene based Polymer Films and Carbon Nanotube based Polymer Films to Optimize the Conductivity

Aim: The piezo resistive property of Graphene PVDF films and Carbon nanotube PVDF films is analyzed and the possibility of replacing solid state resistor (10 ohm) in electronic circuits is explored. Materials and Methods: Embedded hardware interface and Wheatstone bridge circuit is used to analyze the electrical conductivity of Graphene PVDF films (n=10) and Carbon nanotube PVDF films (n=10) of length 2.6 cm and width 1.1 cm. Results: Graphene PVDF films have significantly higher Conductivity (0.082 s/m) (p<0.05) than Carbon nanotube PVDF films (0.0108 s/m). Conclusion: Within the limits of this study Graphene PVDF films offer best Conductivity and can be used as a replacement for solid state resistors.

Humidity-resistive, elastic, transparent ion gel and its use in a wearable, strain-sensing device

Novel hydrogel shows highly elastic, conductive, tough, transparent, humidity-resistive property which is useful for the wearable strain-sensing device.

The impact of different proportions of knitting elements on the resistive properties of conductive fabrics

Conductive yarn is the key factor in fabricating electronic textiles. Generally, three basic fabric production methods (knit, woven, and non-woven) combined with two finishing processes (embroidery and print) are adopted to embed conductive yarns into fabrics to achieve flexible electronic textiles. Conductive yarns with knit structure are the most flexible and effective form of electronic textiles. Electronic textiles present many advantages over conventional electronics. However, in the process of commercialization of conductive knitted fabrics, it is a great challenge to control the complicated resistive networks in conductive knitted fabrics for the purpose of cost saving and good esthetics. The resistive networks in conductive knitted fabrics contain length-related resistance and contact resistance. The physical forms of conductive yarns in different fabrication structures can be very different and, thus, the contact resistance varies greatly in different fabrics. So far, study of controlling the resistive property of conductive fabrics has not been conducted. Therefore, establishing a systematic method for the industry as a reference source to produce wearable electronics is in great demand. During the industrialization of conductive knitted fabrics, engineers can estimate the resistive property of the fabric in advance, which makes the production process more effective and cost efficient. What is more, the resistive distribution in the same area of knitted fabrics can be fully controlled.

The Nano Tungsten Thin Film and its Contacting Property with Aluminium Electrodes

In this paper we report nanothickness tungsten (W) thin films with nanoscale thickness prepared by DC magnetron sputtering. Three kinds of samples were realized using micromachining technology, including two-wire and four-wire terminal configurations and only Al electrodes. Using four-wire terminal method, we studied on the electrical property of W film and the contacting resistance between W film and Al electrode. The results show that our as-deposited W film is β-W crystal structure and exhibits good resistive property. Al formed a good ohmic contact with W films. Both the resistivity of W film and the contacting resistance declined nearly linearly with the thickness increasing.