TY - JOUR
T1 - Hierarchical micro/nanostructured TiO 2 /Ag substrates based on femtosecond laser structuring
T2 - A facile route for enhanced SERS performance and location predictability
AU - Lu, Jinlong
AU - Yang, Jianjun
AU - Singh, Subhash C.
AU - Zhan, Zhibing
AU - Yu, Zhi
AU - Xin, Wei
AU - Huang, Ting
AU - Guo, Chunlei
N1 - Funding Information:
The authors acknowledge the financial supports from National Key R&D Program of China ( 2017YFB1104700 ), National Natural Science Foundation of China ( 11674178 , 51675013 ), Bill & Melinda Gates Foundation ( OPP1119542 ) of USA, and Natural Science Foundation of Tianjin City ( 17JCZDJC37900 ).
Publisher Copyright:
© 2019
PY - 2019/6/1
Y1 - 2019/6/1
N2 - Hierarchical micro/nanostructured TiO 2 /Ag substrates for surface-enhanced Raman scattering (SERS) application are fabricated by depositing Ag nanoparticles on the surface of TiO 2 hierarchical micro/nanostructures, which are formed by combining femtosecond laser structuring with scalable hydrothermal treatment. Our results show that the morphology of hierarchical micro/nano TiO 2 /Ag architectures can significantly influence SERS performance. Compare with one-dimensional TiO 2 /Ag nanostructures hydrothermally fabricated on laser untreated Ti surface, a four-fold enhancement is shown in the SERS signal with excellent reproducibility. Most importantly, enhancement is significantly stronger in the valleys of our microstructures than on the hills due to geometrical orientation of nanostructures on the surface of the microstructure. The site predictability for SERS enhancement is one of the major roadblock for SERS applications. Present study provides an effective way to enhance the site predictability for optimal SERS in addition to a significant enhancement in signal strength.
AB - Hierarchical micro/nanostructured TiO 2 /Ag substrates for surface-enhanced Raman scattering (SERS) application are fabricated by depositing Ag nanoparticles on the surface of TiO 2 hierarchical micro/nanostructures, which are formed by combining femtosecond laser structuring with scalable hydrothermal treatment. Our results show that the morphology of hierarchical micro/nano TiO 2 /Ag architectures can significantly influence SERS performance. Compare with one-dimensional TiO 2 /Ag nanostructures hydrothermally fabricated on laser untreated Ti surface, a four-fold enhancement is shown in the SERS signal with excellent reproducibility. Most importantly, enhancement is significantly stronger in the valleys of our microstructures than on the hills due to geometrical orientation of nanostructures on the surface of the microstructure. The site predictability for SERS enhancement is one of the major roadblock for SERS applications. Present study provides an effective way to enhance the site predictability for optimal SERS in addition to a significant enhancement in signal strength.
KW - Chemical treatment
KW - Femtosecondlaser
KW - Hierarchical micro/nanostructured TiO2/Ag
KW - SERS
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U2 - 10.1016/j.apsusc.2019.01.257
DO - 10.1016/j.apsusc.2019.01.257
M3 - Article
AN - SCOPUS:85061180254
SN - 0169-4332
VL - 478
SP - 737
EP - 743
JO - Applied Surface Science
JF - Applied Surface Science
ER -