TY - JOUR
T1 - Enhanced photoluminescence of DCJTB with ordered Ag-SiO2 core–shell nanostructures via nanosphere lithography
AU - Chau, Yuan Fong Chou
AU - Lin, Chieh Jen
AU - Kao, Tsung-Sheng
AU - Wang, Ya Chih
AU - Ming Lim, Chee
AU - Kumara, N. T.R.N.
AU - Chiang, Hai Pang
N1 - Publisher Copyright:
© 2020 The Authors
PY - 2020/6
Y1 - 2020/6
N2 - We have fabricated Ag-SiO2 core–shell nanostructure set in the hexagonally ordered Ag nanohole array by nanosphere lithography with reactive ion etching, and followed by Ag deposition. The resulting nanostructure includes the triangular-shaped plates with sharp edges on the top, the Ag-SiO2 core–shell nanospheres, the hexagonally arranged nanohole array, a SiO2 buffer layer and a DCJTB (4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran) fluorescent dye layer, respectively. Six patterns of substrates (i.e., Types 1–6) were fabricated and their photoluminescence enhancement performance was compared to substrate layered with pure DCJTB. The experimental results show that photoluminescence enhancement can be 15.69 times, and the lifetime can be shortened from 0.97 ns to 0.41 ns for Type 3 when compared to the pure DCJTB one. The finite element method revealed four structure conditions which are the effects of edge enhancement, gap plasmon resonance, hollow plasmon resonance, and core–shell hybridization plasmon resonance and can contribute to the photoluminescence enhancement factor. The proposed substrates provide a practical detecting platform with plasmon-enhanced photoluminescence, and the fabrication methods used are technically simple and low cost.
AB - We have fabricated Ag-SiO2 core–shell nanostructure set in the hexagonally ordered Ag nanohole array by nanosphere lithography with reactive ion etching, and followed by Ag deposition. The resulting nanostructure includes the triangular-shaped plates with sharp edges on the top, the Ag-SiO2 core–shell nanospheres, the hexagonally arranged nanohole array, a SiO2 buffer layer and a DCJTB (4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran) fluorescent dye layer, respectively. Six patterns of substrates (i.e., Types 1–6) were fabricated and their photoluminescence enhancement performance was compared to substrate layered with pure DCJTB. The experimental results show that photoluminescence enhancement can be 15.69 times, and the lifetime can be shortened from 0.97 ns to 0.41 ns for Type 3 when compared to the pure DCJTB one. The finite element method revealed four structure conditions which are the effects of edge enhancement, gap plasmon resonance, hollow plasmon resonance, and core–shell hybridization plasmon resonance and can contribute to the photoluminescence enhancement factor. The proposed substrates provide a practical detecting platform with plasmon-enhanced photoluminescence, and the fabrication methods used are technically simple and low cost.
KW - Core–shell nanostructures
KW - Finite element method
KW - Hybridization plasmon resonance
KW - Nanosphere lithography
KW - Photoluminescence enhancement
KW - Reactive ion etching
UR - http://www.scopus.com/inward/record.url?scp=85085180477&partnerID=8YFLogxK
U2 - 10.1016/j.rinp.2020.103168
DO - 10.1016/j.rinp.2020.103168
M3 - Article
AN - SCOPUS:85085180477
SN - 2211-3797
VL - 17
JO - Results in Physics
JF - Results in Physics
M1 - 103168
ER -