Fabrication of smart chemical sensors based on transition-doped-semiconductor nanostructure materials with µ-chips.
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.
Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia ; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
Mohammed M
MM
Rahman
Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia ; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
Sher Bahadar
SB
Khan
Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia ; Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
Abdullah M
AM
Asiri
D004566:Electrodes; D000431:Ethanol / Q000737:chemistry; D056656:Lab-On-A-Chip Devices; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods*; D055620:Optical Phenomena; D056951:Photoelectron Spectroscopy; D015203:Reproducibility of Results; D012666:Semiconductors; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D028561:Transition Elements / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry
D028561:Transition Elements; D000431:Ethanol; D015034:Zinc Oxide