Electrowetting devices with transparent single-walled carbon nanotube electrodes

Abstract

Microfluidic devices based on the electrowetting principle, more specifically electrowetting on dielectric, were fabricated using transparent single-walled carbon nanotube films as electrodes. The films were spray coated on glass and polyethylene terephalate substrates. The transmittance and sheet resistance remain unchanged after patterning the films using typical photolithography and plasma etching. Operation of water droplets over the patterned nanotube electrodes was demonstrated, and the performance was found to be comparable to that over the usual metal electrodes. The requirement of transparent electrodes is estimated for displays based on electrowetting machanism, and nanotube films indicate promise for such a type of devices.

Modification of single-walled carbon nanotube electrodes by layer-by-layer assembly for electrochromic devices

“…16 Briefly arc-discharged single wall nanotube ͑Carbon Solutions Inc.͒ are dispersed in water with 0.5% sodium dodecyl sulfate with surfactants of 1 mg/ ml. The solutions were sprayed onto glass or plasticsubstrates which were then heated to 80°C.…”

“…In contrast, we have used a very well established technique of depositing uniform, highly conductive SWCNT films on large areas a͒ These two authors contributed equally to this work. through spray coating 16 and combined the benefits of that method with a bottom-up LbL approach for highly stable EC devices.…”

Electrodes for Microfluidic Integrated Optoelectronic Tweezers

“…SWNT thin films with thickness in the range of 10-100 nm can have low sheet resistance and high optical transparency as well as robust mechanical flexibility [26]. SWNT thin films have been demonstrated in devices including solar cells [27], thin film transistors [28], light emitting diodes [29], and electrowetting [30]. Recent researches suggested that the electrical stability and mechanical robustness of SWNT films could be improved by embedding SWNT thin film into polymers [31][32][33].…”

Thin-film organic semiconductor devices: from flexibility to ultraflexibility

“…To date, the TFC electrodes are mostly based on PE-DOT [36,70,74,[82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98], graphene (GF) [73,75,[99][100][101][102][103][104][105][106][107][108][109][110][111][112], carbon nanotubes (CNTs) [73,101,102,[106][107][108][109]113], Ag-based nanowires/grids/films [72,[114][115][116][117][118][119]…”