Malvern Zetasizer Nano ZS ZEN3600 Dynamic Light Scattering ...

Dynamic Light Sca.ering Par2cle Sizer Model: Malvern Zetasizer Nano ZS ZEN3600 Specifica2ons: Temperature range: 0°C -­‐ 90°C Laser: He-­‐Ne, 4.0mW, 633nm Ø Par2cle size Diameter range: 0.3nm – 10.0 µm * Minimum sample volume: 12 µL ConcentraLon range: Up to 40%w/v* Accuracy: BeTer than -­‐/-­‐2% Ø Zeta poten2al Measurement range: 3.8nm – 100 µm* Minimum sample volume: 150µL ConcentraLon range: Up to 40%w/v* ConducLvity range: 0 to 200mS/cm Zeta potenLal range: No limitaLons Accuracy: 0.12µm.cm/V.s for aqueous systems * sample dependent Measurement of parLcle size Zeta potenLal Molecular weight Molecular weight Ø Molecular weight Molecular weight range: 980Da to 2 x 107Da* Minimum sample volume: 12μL Accuracy: -­‐/-­‐ 10% typical For further technical informaLon, please contact: A/Prof Takuya Tsuzuki InsLtute for FronLer Materials, Deakin University Tel: 03 5227 3205 Email: takuya@deakin.edu.au

Measurement Principles Par2cle size Molecular weight destrucLve interference construcLve interference Zeta poten2al

Opera2on Principle Digital signal processor Correlator Computer ATenuator Detector Laser Detector 90 o Cell Par2cle size measurement Combining opLcs Detector Beam spliTer ATenuator ScaTering beam CompensaLon opLcs Cell Digital signal processor Laser Zeta poten2al measurement Computer

Applica2on note: InvesLgaLon into the locaLon of dopant ions in semiconductor nanoparLcles Ø Zetasizer Nano ZS was used to invesLgate the zeta potenLal of ZnO nanoparLcles doped with Mn and Co. Ø The zeta potenLal of 5 at% Co-­‐doped ZnO was nearly idenLcal with the value of undoped ZnO, indicaLng that Co did not precipitated out on the parLcle surface as a separate phase. Ø On the other hand, the zeta potenLal of 5 at% Mn-­‐doped ZnO was lower than that of undoped ZnO, affected by the negaLve charge from Mn oxides that are precipitated on the parLcle surface.