writer：Huaizhong Shen, Yuxin Wu, Wenjing Wang, Hongyang Su, Wendong Liu, Junhu Zhang, Kai Zhang, and Bai
keywords：none
source：期刊
specific source：J. Mater. Chem. C
Issue time：2017年
Visible detection of electromagnetic waves is important. Herein, we propose a method to trace invisible
near infrared (NIR) light by combining thermo-sensitive one-dimensional photonic crystals (1DPCs) and Au
nanorods (NRs). Au NRs first absorb the NIR light and convert it into heat energy, then the temperature
increase and the thermo-sensitive 1DPC produces a response through conformation transfer of the
PNIPAm layer leading to the disappearance of its structural color, which is a quite obvious signal. We also
realize the di?erentiation of NIR light belonging to a di?erent wavelength range by building hybrid 1DPCs
with Au NRs of di?erent absorbance. The 1DPC/Au hybrid system is easy to prepare in a large area with
low cost, the signal read-out can be observed by the naked eye and the polymer matrix also makes it a
promising flexible device. We believe that such a device will be portable and has the potential to be used
in various applications in daily life.