研究目的
Investigating the use of core/shell upconversion nanocrystal hybrids with temperature-dependent emission color changes for multilevel anticounterfeiting applications.
研究成果
Novel UC nanocomposites were fabricated by directly mixing core/shell NCs with various emitting ions and shell structures. These hybrids show temperature-responsive color-shifting properties, offering a very high level of security for anticounterfeiting applications. The color changes can be realized by simple heating or altering the NIR laser power and prolonging the irradiation time, indicating their great potential for producing enhanced anticounterfeiting patterns with high-level security but simple recognition methods.
研究不足
The practical applications of UCNCs are partly limited by their unicolor emissions upon excitation by the near-infrared (NIR) laser, and the risk of forgery by sophisticated counterfeiters still occurs. The exploration of novel UC nanomaterials with high-level security, simple fabrication procedures, and convenient authentication methods is highly desired.
