TY - JOUR
T1 - Voltage effects on the nanoelectrospray characteristics in fully voltage-controlled atomisation of gold nanocolloids
AU - Wang, Ke
AU - Stark, J P W
PY - 2010/10/29
Y1 - 2010/10/29
N2 - 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.
AB - 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.
KW - electrical conductivity
KW - nanoelectrospray characteristics
KW - electrohydrodynamic atomisation
KW - nanocolloids
UR - http://www.scopus.com/inward/record.url?scp=77957970295&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1016/j.aca.2010.09.005
U2 - 10.1016/j.aca.2010.09.005
DO - 10.1016/j.aca.2010.09.005
M3 - Article
SN - 0003-2670
VL - 679
SP - 81
EP - 84
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 1-2
ER -