Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
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TY - GEN
T1 - Photocatalytic initiation of electroless deposition
AU - Galea, S.
AU - Boxall, C.
AU - Goodall, P. S.
AU - Woodbury, S.
PY - 2007/12/31
Y1 - 2007/12/31
N2 - We report a one step Photocatalytically Initiated Electroless Deposition (PIED) process that allows for the photogeneration of coherent, conducting metal layers on semiconductor-sensitised insulator surfaces. Layers of silver have been generated on mesoporous TiO2 layers and nanoparticulate TiO 2 coated quartz and PVDF membranes. Deposition occurs only onto areas of the substrate both sensitised with TiO2 and illuminated with light. Morphology of the resultant layer is dependant upon the nucleation density occurring during the primary photocatalytic stage of PIED. Electrogravimetry indicates that PIED results in an enhanced rate of metal nucleation on TiO2 surfaces, compared to bare metal. The mixed potential measured at TiO2-coated electrodes shifts by ∼-75 -100 mV upon illumination during PIED, resulting in more-facile semiconductor-to- solution electron transfer, so explaining the enhanced rate of nucleation in the light. PIED provides a cheaper, environmentally cleaner and more controllable option than the traditional technique of plating onto dielectric surfaces.
AB - We report a one step Photocatalytically Initiated Electroless Deposition (PIED) process that allows for the photogeneration of coherent, conducting metal layers on semiconductor-sensitised insulator surfaces. Layers of silver have been generated on mesoporous TiO2 layers and nanoparticulate TiO 2 coated quartz and PVDF membranes. Deposition occurs only onto areas of the substrate both sensitised with TiO2 and illuminated with light. Morphology of the resultant layer is dependant upon the nucleation density occurring during the primary photocatalytic stage of PIED. Electrogravimetry indicates that PIED results in an enhanced rate of metal nucleation on TiO2 surfaces, compared to bare metal. The mixed potential measured at TiO2-coated electrodes shifts by ∼-75 -100 mV upon illumination during PIED, resulting in more-facile semiconductor-to- solution electron transfer, so explaining the enhanced rate of nucleation in the light. PIED provides a cheaper, environmentally cleaner and more controllable option than the traditional technique of plating onto dielectric surfaces.
U2 - 10.1149/1.2794466
DO - 10.1149/1.2794466
M3 - Conference contribution/Paper
AN - SCOPUS:45549108937
SN - 9781604238846
VL - 6
T3 - ECS Transactions
SP - 199
EP - 208
BT - ECS Trancsactions - Electrochemical Processing in ULSI and MEMS 3
PB - ECS Transactions
T2 - Electrochemical Processing in ULSI and MEMS 3 - 211th ECS Meeting
Y2 - 8 May 2007 through 9 May 2007
ER -