Electrical and optical characteristics of the Pd-decorated Graphene/Silicon Schottky diode gas sensors of plasmonic properties

Data set consists of four files comprising:

UV-vis spectroscopy (absorbance) data for palladium (Pd) nanoparticles.
Electrical responses in the form of current-voltage (I-V) characteristics for Pd-Graphene/Silicon (Pd-G/Si) sensors and Graphene/Silicon (G/Si) sensors
Time-domain responses for Pd-Graphene/Silicon (Pd-G/Si) sensors

File with I-V characteristics comprises raw data and modified data (calculated sensor current or voltage response at the specific voltage or current bias). Sensors characteristics were recorded in the dark and under ultraviolet (UV) light of three different wavelengths - 355 nm, 275 nm, 255 nm. Only UV light of 275 nm was the one that induced localized surface plasmon resonance in the sensing structure of Pd-G/Si. The gas responses were recorded for two target gases: NO2 and NH3. Higher sensitivity and repeatability was observed for NO2, and characteristics shift in the I-V curve was observed under plasmonic conditions. This data shows that solely electrical characteristics can be used to observe plasmon-enhanced gas sensing instead of more complex optical measurements.

本数据集包含四个文件，具体涵盖如下内容：
1. 钯（Pd）纳米粒子的紫外-可见（UV-vis）吸收光谱数据；
2. 钯-石墨烯/硅（Pd-G/Si）传感器与石墨烯/硅（G/Si）传感器的电流-电压（I-V）特性电学响应数据；
3. 钯-石墨烯/硅（Pd-G/Si）传感器的时域响应数据。

包含电流-电压（I-V）特性的文件同时收录原始数据与修正后数据，即特定电压或电流偏置条件下计算得到的传感器电流或电压响应。

传感器特性的测试分别在暗环境以及三种不同波长的紫外（UV）光照射下开展，所用紫外光波长分别为355 nm、275 nm与255 nm。其中仅275 nm的紫外光可在Pd-G/Si传感结构中诱导局域表面等离子体共振（localized surface plasmon resonance）。

本实验针对二氧化氮（NO₂）与氨气（NH₃）两种目标气体记录了气体响应特性。结果显示，传感器对NO₂的灵敏度与重复性更优，且在等离子体作用条件下可观测到I-V曲线的特征偏移。

本数据集证实，仅通过电学特性即可实现等离子体增强型气体传感的观测，无需依赖更为复杂的光学测量手段。