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Full-Text Articles in Nanoscience and Nanotechnology

Metamaterials On Parylene Thin Film Substrates: Design, Fabrication, And Characterization At Terahertz Frequency, Xianliang Liu, Samuel Macnaughton, David Shrekenhamer, Hu Tao, Selvapraba Selvarasah, Atcha Totachawattana, Richard Averitt, Mehmet Dokmeci, Sameer Sonkusale, Willie Padilla Jun 2011

Metamaterials On Parylene Thin Film Substrates: Design, Fabrication, And Characterization At Terahertz Frequency, Xianliang Liu, Samuel Macnaughton, David Shrekenhamer, Hu Tao, Selvapraba Selvarasah, Atcha Totachawattana, Richard Averitt, Mehmet Dokmeci, Sameer Sonkusale, Willie Padilla

Mehmet R. Dokmeci

We design, fabricate, and characterize terahertz (THz) resonant metamaterials on parylene free-standing thin film substrates. Several different metamaterials are investigated and our results show strong electromagnetic responses at THz frequencies ranging from 500 GHz to 2.5 THz. The complex frequency dependent dielectric properties of parylene are determined from inversion of reflection and transmission data, thus indicating that parylene is an ideal low loss substrate or coating material. The biostable and biocompatible properties of parylene coupled with the multifunctional exotic properties of metamaterials indicate great potential for medical purposes such as THz imaging for skin cancer detection.


Synthesis Of Ordered Arrays Of Multiferroic Nife₂O₄-Pb(Zr₀.₅₂Ti₀.₄₈)O₃ Core-Shell Nanowires, Ming Liu, Xin Li, Hassan Imrane, Yajie Chen, Trevor L. Goodrich, Zhuhua Cai, Katherine S. Ziemer, Jian Y. Huang, Nian X. Sun Jan 2011

Synthesis Of Ordered Arrays Of Multiferroic Nife₂O₄-Pb(Zr₀.₅₂Ti₀.₄₈)O₃ Core-Shell Nanowires, Ming Liu, Xin Li, Hassan Imrane, Yajie Chen, Trevor L. Goodrich, Zhuhua Cai, Katherine S. Ziemer, Jian Y. Huang, Nian X. Sun

Katherine S. Ziemer

A synthesis method was developed for producing core-shell nanowire arrays, which involved a combination of a modified sol-gel process, electrochemical deposition, and subsequent oxidization in anodized nanoporous alumina membranes. This method was applied to generate ordered arrays of one dimensional multiferroic NiFe₂O₄ core and Pb(Zr₀.₅₂Ti₀.₄₈)O₃ (PZT) shell nanostructures. Extensive microstructural, magnetic, and ferroelectric characterizations confirmed that the regular arrays of core-shell multiferroic nanostructures were composed of a spinel NiFe₂O₄ core and perovskite PZT shell. This synthesis method can be readily extended to prepare different core-shell nanowire arrays and is expected to pave the way for one dimensional core-shell nanowire arrays.