Abstract
We report a new method for detecting variable resistance during short time intervals by using an optical method. A novel variable-resistance sensor composed of up-conversion nanoparticles (NaYF4:Yb3+,Er3+) and reduced graphene oxide (RGO) is designed based on characteristics of a negative temperature coefficient (NTC) resistive element. The fluorescence intensity ratio (FIR) technology based on green and red emissions is used to detect variable resistance. Combining the Boltzmann distributing law with Steinhart–Hart equation, the FIR and relative sensitivity SR as a function of resistance can be defined. The maximum value of SR is 1.039 × 10−3/Ω. This work reports a new method for measuring variable resistance based on the experimental data from fluorescence spectrum.
Highlights
The resistor is a passive two-terminal electrical component with a major physical feature of converting electrical energy into thermal energy [1,2], which implements electrical resistance as a circuit element
The composite material composed of reduced graphene oxide (RGO) and NaYF4 :Yb3+,Er3+ will show bi-functional properties such as fluorescence and negative temperature coefficient (NTC) resistive element [23,24,25]
The relation between temperature and this paper, we design the composite nanomaterial (RGO-NaYF4:Yb,Er ) as a variable-resistance resistance cantheoretical be obtainedanalysis from dependence of resistance temperature according to Steinhart–Hart sensor
Summary
The resistor is a passive two-terminal electrical component with a major physical feature of converting electrical energy into thermal energy [1,2], which implements electrical resistance as a circuit element. The composite material composed of RGO and NaYF4 :Yb3+ ,Er3+ will show bi-functional properties such as fluorescence and negative temperature coefficient (NTC) resistive element [23,24,25]. This paper, we design the composite nanomaterial (RGO-NaYF4:Yb ,Er ) as a variable-resistance resistance cantheoretical be obtainedanalysis from dependence of resistance temperature according to Steinhart–Hart sensor.
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