| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2018) | |
| Thin Films | Wednesday Sessions |
| Session TF-WeP |
| Session: | Thin Films Poster Session II |
| Presenter: | Yi-Chi Lu, National Taiwan University of Science and Technology, Taiwan, Republic of China |
| Authors: | Y.C. Lu, National Taiwan University of Science and Technology, Taiwan, Republic of China H.C. Ho, National Taiwan University, Republic of China C.H. Hsueh, National Taiwan University, Republic of China J.K. Chen, National Taiwan University of Science and Technology, Republic of China J.P. Chu, National Taiwan University of Science and Technology, Taiwan, Republic of China |
| Correspondent: | Click to Email |
Metallic glass (MG) is a new class of alloys with the amorphous structure and unique characteristics, including high strength, smooth surface, absence of grain boundaries, and corrosion resistance. MG materials can exhibit a plastic-like flow property at temperatures between glass transition (Tg) and crystallization (Tx). It has been reported that Au-based MGs possess negative dielectric constants and could be used as plasmonic materials. Furthermore, with a low Tg temperature of Au-based thin-film MGs (TFMGs), large dimensions of nanostructures can be thermally imprinted in air [1]. Both measurements and simulations have shown that designed nanostructures were suitable for surface-enhanced Raman scattering (SERS) applications. In addition, in the absence of grain boundaries in amorphous TFMGs, damping due to increased scattering at grain boundaries does not occur, and SERS could be improved. In addition to the thermal imprint method, the metallic glass nanotube (MGNT) array on Si has been successfully fabricated by a widely-used lithography and sputter deposition process for very large-scale integration [2]. Like other nanostructured surfaces, MGNT array surfaces show water repelling and attracting properties. In this presentation, as-prepared nanotubes are 500-800 nm tall and 500-800 nm in diameter and they are used for the SERS property evaluations. The MG alloys selected include Pd-, Ti-, and Zr-based systems. The characterization results are obtained and will be discussed in the presentation. Hence, our result shed lights on the possibility of MGNT array for plasmonic applications.
References
[1] Cheng Wang, Li-Wei Nien, Hsin-Chia Ho, Yi-Chen Lai, and Chun-Hway Hsueh, Surface plasmon excited on imprintable thin-film metallic glasses for surface-enhanced Raman scattering applications, ACS Appl. Nano Mater., 1 (2018), 908−914.
[2] J. K. Chen, W. T. Chen, C. C. Cheng, C. C. Yu and J. P. Chu, Metallic glass nanotube arrays: preparation and surface characterizations, Materials Today, 21 (2018), 178-185.