Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 81-84 |
| Number of pages | 4 |
| Journal | Analytica Chimica Acta |
| Volume | 679 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 29 Oct 2010 |
Keywords
- electrical conductivity
- nanoelectrospray characteristics
- electrohydrodynamic atomisation
- nanocolloids
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