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In this paper, we investigated RNA base dependent gas sensing characteristics using single-stranded RNA (ss-RNA) decorated single-walled carbon nanotube (SWNT) devices. SWNTs were placed on to Au microelectrodes by a low temperature and low cost Dielectrophoretic assembly process. Four homo ribonucleic acid (RNA) sequences and four repeated RNA sequences were coated on to SWNTs and the corresponding...
Carbon nanotubes (CNT) have been grown in microfluidic glass channels for chemical analysis based on electrokinetic separations. A limitation of CNTs for this type of application is their high conductivity, which prevent them from being used for electroosmotic pumping with electrical field strengths in the range of 0.5–1.0 kV/cm. This range of field strength is desirable for most electrokinetic separation...
This article reports the effect of deoxyribonucleic acid (DNA) sequence length on the sensing characteristics of DNA decorated single-walled carbon nanotube (SWNT) devices. First, SWNTs were assembled on micro electrodes via a versatile, solution based Dielectrophoresis process. Then four single-stranded poly-G oligomers with lengths of 8, 16, 24 and 32 were decorated on SWNTs and the response of...
In this work, we present a novel piezoresistive tactile sensing array which is capable of retaining and erasing tactile images. The sensing element comprises polydimethylsiloxane (PDMS) polymer mixed with multi-wall carbon nanotubes (MWCNTs) and silver nano-particles by using the dielectrophoresis (DEP) technique. When the sensing element is pressed, the resistivity increases and retains. The resistivity...
Single-Walled Carbon Nanotubes (SWNTs) are reported to be very sensitive to numerous odors and could serve as the next generation of miniature gas sensors. Recently, we have shown that SWNTs functionalized with DNA hold even greater promise than bare SWNTs as high sensitivity gas sensors. The DNA-decorated SWNT gas sensors were integrated on CMOS circuitry with built-in amplifiers. In the paper, we...
The identification of disease-related genes and their complete nucleotide sequence through the human genome project provides us with a remarkable opportunity to combat a large number of diseases with designed genes as medicine. However, gene therapy relies on the efficient and nontoxic transport of therapeutic genetic medicine through the cell membranes, and this process is very inefficient. Carbon...
In this paper, we demonstrate the integration of single-stranded-DNA (ss-DNA) decorated single-walled carbon nanotubes (SWNT) onto complementary metal oxide semiconductor (CMOS) circuitry for gas sensing applications. Utilizing dielectrophoresis (DEP) assembly, a simple and a low temperature process, we first demonstrate integration of SWNTs onto CMOS circuitry at the die level. SWNTs are sensitive...
Magnetic nanoparticles and carbon nanotubes have both attained a large amount of focus due to their versatile properties and numerous applications. Thus, interfacing magnetic nanoparticles with carbon nanotubes would generate a class of functional materials with broad potential towards nanoscale medicine. Here, a novel method is discussed of incorporating magnetic nanoparticles (iron oxides) onto...
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