Voltage effects on the nanoelectrospray characteristics in fully voltage-controlled atomisation of gold nanocolloids
Wang, K. and Stark, J. P. W., 2010. Voltage effects on the nanoelectrospray characteristics in fully voltage-controlled atomisation of gold nanocolloids. Analytica Chimica Acta, 679 (1-2), pp. 81-84.
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The voltage effects on fully voltage-controlled nanoelectrospraying of aqueous gold nanocolloids were investigated In the nanoelectrospray using 30 mu m nozzle with an increasing of voltage two stable spray regimes of pulsating and cone-Jet mode were clearly observed by a combination of current measurement and fast imaging technology In this nanoelectrospray uniquely determined by the electrical field voltage the current-voltage characteristics were analysed and evaluated based on an equivalent circuit method At high field in cone-Jet regime all the equivalent resistances derived by fitting appear close to a value of 0 53 +/- 003 G Omega showing independence to the conductivity of the nanocolloids In low field pulsating regime a high pulsation frequency up to 100 kHz with relatively stable current pulse was exhibited in all the gold nanocolloids A linear relationship between the DC components in the pulsating current and the voltage was found and the DC equivalent resistance obtained from the fitting varies between 090 and 1 47 G Omega A strong correlation between the pulsating properties and the conductivity of the colloids was identified.
|Creators||Wang, K.and Stark, J. P. W.|
|Uncontrolled Keywords||electrical conductivity,nanoelectrospray characteristics,electrohydrodynamic atomisation,nanocolloids|
|Departments||Faculty of Science > Physics|
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