Abstract
Vanadium dioxide (VO2) is a unique active plasmonic material due to its intrinsic metal-insulator transition, remaining less explored. Herein, we pioneer a method to tailor the VO2 surface plasmon by manipulating its atomic defects and establish a universal quantitative understanding based on seven representative defective VO2 systems. Record high tunability is achieved for the localized surface plasmon resonance (LSPR) energy (0.66-1.16 eV) and transition temperature range (40-100 °C). The Drude model and density functional theory reveal that the charge of cations plays a dominant role in the numbers of valence electrons to determine the free electron concentration. We further demonstrate their superior performances in extensive unconventional plasmonic applications including energy-saving smart windows, wearable camouflage devices, and encryption inks. This journal is
| Original language | English |
|---|---|
| Pages (from-to) | 1700-1710 |
| Number of pages | 11 |
| Journal | Materials Horizons |
| Volume | 8 |
| Issue number | 6 |
| Early online date | 14 May 2021 |
| DOIs | |
| Publication status | Published - 1 Jun 2021 |
| Externally published | Yes |
Funding
Y. Long is thankful for the funding support from the National Research Foundation, Prime Minister’s Office, Singapore, under its Campus for Research Excellence and Technological Enterprise (CREATE) programme, Sino-Singapore International Joint Research Institute, and Minister of Education Singapore Tier 1 RG86/20 and RG103/19 for funding support. Z. M. Sun is thankful for the funding support from National Key Research and Development Program of China (Grant No. 2017YFB0701700). Y. Zhong, Y. Liu, and X. Ye were supported by the Indiana University FRSP Grant and IU-MSI STEM Initiative Seed Grant.