Title :
Formation of gold Nano-particle chains by DEP — a parametric experimental analysis
Author :
Leung, Siu Ling ; Ming Lin Li ; Li, Wen J.
Author_Institution :
Centre for Micro & Nano Syst., Chinese Univ. of Hong Kong, Hong Kong
Abstract :
Experimental results on varying particle size and dielectrophoretic (DEP) parameters, including voltage and frequency, are reported in this paper for investigating their effect on Au nano-particles Pearl Chain Formation (PCF). PCF was observed from 10 kHz to 5 MHz for 100nm gold Nano-particles (NPs), and 100 kHz to 10 MHz for 10 nm gold NPs. Variations in formation rate were detected when the applied voltage and particle size varied. With higher voltage, pearl chain begins to form at higher rate and the formation time decreases. The optimum frequency of the gold NPs PCF shifts to higher frequency region when the particle size decreases. Theoretical analysis was carried out by applying the theories of DEP force and AC electrokinetics to explain the observations in the DEP frequency ranging from 10 Hz to 10MHz.
Keywords :
electrophoresis; gold; nanoparticles; particle size; AC electrokinetics; Au; DEP force; PCF; dielectrophoretic parameters; frequency 10 kHz to 5 MHz; frequency 100 kHz to 10 MHz; gold nanoparticle chains; particle size; pearl chain formation; Automation; Dielectrophoresis; Electrodes; Frequency; Gold; Microelectrodes; Nanoscale devices; Resistors; Resists; Voltage; AC electrokinetics; DEP Based Assembly; Dielectrophoresis Force; Gold Collodial Particles; Nano-assembly;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2008. NEMS 2008. 3rd IEEE International Conference on
Conference_Location :
Sanya
Print_ISBN :
978-1-4244-1907-4
Electronic_ISBN :
978-1-4244-1908-1
DOI :
10.1109/NEMS.2008.4484496
