منابع مشابه
Dielectrophoresis Aligned Single-Walled Carbon Nanotubes as pH Sensors
Here we report the fabrication and characterization of pH sensors using aligned single-walled carbon nanotubes (SWNTs). The SWNTs are dispersed in deionized (DI) water after chemical functionalization and filtration. They are deposited and organized on silicon substrates with the dielectrophoresis process. Electrodes with "teeth"-like patterns-fabricated with photolithography and wet etching-ar...
متن کاملPrecise positioning of single-walled carbon nanotubes by ac dielectrophoresis
The precise placement of single-walled carbon nanotubes SWCNTs in device architectures by ac dielectrophoresis involves the optimization of the electrode geometry, applied voltage and frequency, load resistance, and type of nanotube sample used. The authors have developed a toolkit to controllably integrate SWCNTs in device structures by the use of floating potential metal posts and appropriate...
متن کاملSingle-Walled Carbon Nanotubes Probed with Insulator-Based Dielectrophoresis
Single-walled carbon nanotubes (SWNTs) offer unique electrical and optical properties. Common synthesis processes yield SWNTs with large length polydispersity (several tens of nanometers up to centimeters) and heterogeneous electrical and optical properties. Applications often require suitable selection and purification. Dielectrophoresis is one manipulation method for separating SWNTs based on...
متن کاملElectrothermal flow in Dielectrophoresis of Single-Walled Carbon Nanotubes
We theoretically investigate the impact of the electrothermal flow on the dielectrophoretic separation of single-walled carbon nanotubes (SWNT). The electrothermal flow is observed to control the motions of semiconducting SWNTs in a sizeable domain near the electrodes under typical experimental conditions, therefore helping the dielectrophoretic force to attract semiconducting SWNTs in a broade...
متن کاملDiameter modulation of vertically aligned single-walled carbon nanotubes.
We demonstrate wide-range diameter modulation of vertically aligned single-walled carbon nanotubes (SWNTs) using a wet chemistry prepared catalyst. In order to ensure compatibility to electronic applications, the current minimum mean diameter of 2 nm for vertically aligned SWNTs is challenged. The mean diameter is decreased to about 1.4 nm by reducing Co catalyst concentrations to 1/100 or by i...
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ژورنال
عنوان ژورنال: Biosensors
سال: 2011
ISSN: 2079-6374
DOI: 10.3390/bios010100023