TY - JOUR
T1 - Al2O3-modified surface-enhanced Raman scattering-active gold nanoparticles on substrates by using sonoelectrochemical pulse deposition
AU - Chang, Chun Chao
AU - Yu, Chung Chin
AU - Liu, Yu Chuan
AU - Yang, Kuang Hsuan
PY - 2013
Y1 - 2013
N2 - As shown in the literature, many methods have been developed to improve signals, reproducibility and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. However, the fabrication can be laborious. In this work, we propose a simple pathway to prepare SERS-active substrates with Al2O3-modified Au nanoparticles (NPs) by sonoelectrochemical deposition-dissolution cycles (SEDDCs). Based on probe molecules of Rhodamine 6G (R6G), an enhancement factor of 4.4 × 10 8 and a detection limit of 2 × 10-14 M were observed on the proposed SERS-active substrates. The reproducibility and stabilities of the proposed SERS-active substrates are satisfactory. Also, the prepared Al 2O3-modified Au NPs-deposited substrate can markedly improve the thermal stability by raising the operation temperature over 50 C, as compared with unmodified Au NPs-deposited substrate. Meanwhile, aging of SERS effect observed on this proposed substrate is slight in an atmosphere of 50% RH and 20% (v/v) O2 at 30°C for 60 day.
AB - As shown in the literature, many methods have been developed to improve signals, reproducibility and stabilities of surface-enhanced Raman scattering (SERS) for their reliable applications. However, the fabrication can be laborious. In this work, we propose a simple pathway to prepare SERS-active substrates with Al2O3-modified Au nanoparticles (NPs) by sonoelectrochemical deposition-dissolution cycles (SEDDCs). Based on probe molecules of Rhodamine 6G (R6G), an enhancement factor of 4.4 × 10 8 and a detection limit of 2 × 10-14 M were observed on the proposed SERS-active substrates. The reproducibility and stabilities of the proposed SERS-active substrates are satisfactory. Also, the prepared Al 2O3-modified Au NPs-deposited substrate can markedly improve the thermal stability by raising the operation temperature over 50 C, as compared with unmodified Au NPs-deposited substrate. Meanwhile, aging of SERS effect observed on this proposed substrate is slight in an atmosphere of 50% RH and 20% (v/v) O2 at 30°C for 60 day.
KW - Detection limit
KW - Electrochemical methods
KW - Modification
KW - Surface-enhanced Raman scattering
UR - http://www.scopus.com/inward/record.url?scp=84876152727&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876152727&partnerID=8YFLogxK
U2 - 10.1016/j.jelechem.2013.03.005
DO - 10.1016/j.jelechem.2013.03.005
M3 - Article
AN - SCOPUS:84876152727
SN - 1572-6657
VL - 696
SP - 38
EP - 44
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
ER -