Department of Chemistry and Physics, Belmont University , 1900 Belmont Boulevard, Nashville, Tennessee 37212-3757, United States.
Nano Lett. 2013 Sep 11;13(9):4169-75. doi: 10.1021/nl401823r. Epub 2013 Aug 8.
An array of 180 nm diameter gold nanoparticles (NPs) embedded in a thin vanadium dioxide film was used as a nanoscale probe of the thermochromic semiconductor-to-metal transition (SMT) in the VO2. The observed 30% reduction in plasmon dephasing time resulted from the interaction between the localized surface plasmon resonance of the NPs with the 1.4 eV electronic transitions in VO2. The NPs act as nanoantennas probing the SMT; homogeneous broadening of the gold plasmon resonance is observed at the temperatures where electron correlations are strongest in VO2.
在一层厚度约为 180nm 的二氧化钒薄膜中嵌入了一层纳米金颗粒阵列，作为探测 VO2 中半导体-金属相变（SMT）的纳米探针。研究发现，由于纳米颗粒的局域表面等离子体共振与 VO2 中 1.4eV 的电子跃迁相互作用，等离子体退相时间减少了 30%。纳米颗粒充当纳米天线来探测 SMT；在电子相关最强的温度下，金等离子体共振出现均匀展宽。
