Rahman Mohammed M, Khan Sher Bahadar, Asiri Abdullah M
Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia ; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
PLoS One. 2014 Jan 13;9(1):e85036. doi: 10.1371/journal.pone.0085036. eCollection 2014.
Transition metal doped semiconductor nanostructure materials (Sb2O3 doped ZnO microflowers, MFs) are deposited onto tiny µ-chip (surface area, ∼0.02217 cm(2)) to fabricate a smart chemical sensor for toxic ethanol in phosphate buffer solution (0.1 M PBS). The fabricated chemi-sensor is also exhibited higher sensitivity, large-dynamic concentration ranges, long-term stability, and improved electrochemical performances towards ethanol. The calibration plot is linear (r(2) = 0.9989) over the large ethanol concentration ranges (0.17 mM to 0.85 M). The sensitivity and detection limit is ∼5.845 µAcm(-2)mM(-1) and ∼0.11±0.02 mM (signal-to-noise ratio, at a SNR of 3) respectively. Here, doped MFs are prepared by a wet-chemical process using reducing agents in alkaline medium, which characterized by UV/vis., FT-IR, Raman, X-ray photoelectron spectroscopy (XPS), powder X-ray diffraction (XRD), and field-emission scanning electron microscopy (FE-SEM) etc. The fabricated ethanol chemical sensor using Sb2O3-ZnO MFs is simple, reliable, low-sample volume (<70.0 µL), easy of integration, high sensitivity, and excellent stability for the fabrication of efficient I-V sensors on μ-chips.
将过渡金属掺杂的半导体纳米结构材料（Sb2O3 掺杂的 ZnO 微花，MFs）沉积在微小的 μ 芯片（表面积约为 0.02217 cm²）上，以制造用于检测磷酸盐缓冲溶液（0.1 M PBS）中有毒乙醇的智能化学传感器。所制备的化学传感器对乙醇还表现出更高的灵敏度、大动态浓度范围、长期稳定性以及改善的电化学性能。在较大的乙醇浓度范围（0.17 mM 至 0.85 M）内，校准曲线呈线性（r² = 0.9989）。灵敏度和检测限分别约为 5.845 μAcm⁻²mM⁻¹ 和 0.11±0.02 mM（信噪比为 3 时）。在此，掺杂的 MFs 通过在碱性介质中使用还原剂的湿化学工艺制备，通过紫外可见光谱、傅里叶变换红外光谱、拉曼光谱、X 射线光电子能谱（XPS）、粉末 X 射线衍射（XRD）和场发射扫描电子显微镜（FE-SEM）等进行表征。使用 Sb2O3-ZnO MFs 制备的乙醇化学传感器简单、可靠、样品体积小（<70.0 μL）、易于集成、灵敏度高且稳定性优异，可用于在 μ 芯片上制造高效的 I-V 传感器。
