TY - JOUR
T1 - Patterned growth of Au nanoparticles on polycrystalline lead zirconate titanate surfaces
AU - Kim, Jung Hun
AU - Kwon, Sangwoo
AU - Yang, Woochul
N1 - Publisher Copyright:
Copyright © 2014 American Scientific Publishers All rights reserved.
PY - 2014
Y1 - 2014
N2 - We report the patterned growth of Au nanoparticles (NPs) on polarity-patterned polycrystalline lead zirconate titanate (PZT) as a template through photochemical reaction. The photochemical deposition of the Au NPs includes ultraviolet (UV) light illumination of the patterned PZT while immersed in a HAuCl4 solution. In particular, the influence of the UV wavelength, and the influence of the solution with the stabilizer and reducer on the growth selectivity of the Au NPs on the polarity-patterned regions was investigated. For a UV light of 365 nm wavelength, corresponding to a band-gap excitation of the PZT, more Au NPs were deposited on the +z polar region than on the other non-polar regions. However, no deposition of the Au NPs was observed for UV light wavelengths longer than ∼365 nm. When ascorbic acid (AA) as a reducer and cetyl-trimethylammonium bromide (CTAB) as a stabilizer were added to the HAuCl4 solution, the Au NPs on the +z polar region were observed to be deposited with a UV light of 435 nm, which is larger than the optical band gap wavelength of the PZT. Also, the growth selectivity and size uniformity on the +z region was significantly improved. These results could be due to the defect-induced photo-excitation of electrons and enhanced reduction process of Au+ ions by adding the reducer and the stabilizer in the photo-chemical process. This study suggests the possibility of the patterned growth of Au NPs on a ferroelectric surface through polarity patterning and photochemical reaction by optimizing the UV wavelength and employing reduction potential agents in a metal salt solution.
AB - We report the patterned growth of Au nanoparticles (NPs) on polarity-patterned polycrystalline lead zirconate titanate (PZT) as a template through photochemical reaction. The photochemical deposition of the Au NPs includes ultraviolet (UV) light illumination of the patterned PZT while immersed in a HAuCl4 solution. In particular, the influence of the UV wavelength, and the influence of the solution with the stabilizer and reducer on the growth selectivity of the Au NPs on the polarity-patterned regions was investigated. For a UV light of 365 nm wavelength, corresponding to a band-gap excitation of the PZT, more Au NPs were deposited on the +z polar region than on the other non-polar regions. However, no deposition of the Au NPs was observed for UV light wavelengths longer than ∼365 nm. When ascorbic acid (AA) as a reducer and cetyl-trimethylammonium bromide (CTAB) as a stabilizer were added to the HAuCl4 solution, the Au NPs on the +z polar region were observed to be deposited with a UV light of 435 nm, which is larger than the optical band gap wavelength of the PZT. Also, the growth selectivity and size uniformity on the +z region was significantly improved. These results could be due to the defect-induced photo-excitation of electrons and enhanced reduction process of Au+ ions by adding the reducer and the stabilizer in the photo-chemical process. This study suggests the possibility of the patterned growth of Au NPs on a ferroelectric surface through polarity patterning and photochemical reaction by optimizing the UV wavelength and employing reduction potential agents in a metal salt solution.
KW - Atomic Force Microscopy (AFM)
KW - Au Nanoparticles (NPs)
KW - Ferroelectrics
KW - Lead Zirconate Titanate (PZT)
KW - Polarity-pattern
UR - http://www.scopus.com/inward/record.url?scp=84946506134&partnerID=8YFLogxK
U2 - 10.1166/jnn.2014.9432
DO - 10.1166/jnn.2014.9432
M3 - Article
AN - SCOPUS:84946506134
SN - 1533-4880
VL - 14
SP - 7985
EP - 7989
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
IS - 10
ER -