Semiconductor ZnO Nano-Rods Thin Film Grown on Silver Wire for Hemoglobin Biosensor Fabrication

Abstract

Wurtzite hexagonal ZnO semiconductor nano-rods (NRs) thin films were grown on silicon substrates and silver wire with diameter equal 68 nm. Sol gel (SG) and aqueous chemical growth (ACG) methods by two steps of preparation (seed layers and nano-rod growth) are used for samples preparation. The structural and morphological properties are evaluated using X-ray diffraction (XRD) and scanning electron microscope (SEM). The proposed iron ion sensor has shown good linearity for a wide concentration range from 0.078 M/L to 0.26 M/L of iron ions. The results show that the electrode is highly sensitive to iron ions with a slope around 47.8 mV/decade with a regression coefficient R 2 = 0.96.

Room temperature ferromagnetism and dielectric enhancement in nanocomposites ZnO doped with iron

“…Zinc acetate, iron nitrate, Monoethanolamine, and absolute ethanol were used as the preliminary precursors, stabilizers, and solvent, respectively. First, zinc acetate and iron nitrate were mixed in absolute ethanol [33]. The molar ratio of Monoethanolamine to zinc acetate was preserved at 1.…”

Nano-rods oxide materials for biosensor application.

“…ZnO-(NRs) based biosensor is one of the important potential applications. (Fe 3+ ) biosensor based on ZnO-(NRs) with selective iron iono-phore (18 crown 6) was reported and studied well previously by our team work and others [1]. ZnO has generated great interest in biosensors due to its many important properties such as being biosafe, possesses polar surface, their small size and many other properties that facilitate chemical and bio-sensing.…”

“…Increasing interest in smart technologies directs our attention toward oxide materials such as ZnO as a possible low cost solution for energy needs. ZnO is gaining significant interest due to the ability to be prepared in a highly oriented manner at a low temperature, on different flexible substrates, with associated nano-structured growth and texture [1][2][3].…”

Highly Sensitive Zinc Oxide Fiber-Optic Biosensor for the Detection of CD44 Protein

“…In addition, it is considered one of the leaders among oxide semiconductors due to its amazing physical and chemical properties. Semiconductor ZnO is an inorganic binary compound A II B IV with a band gap of 3.37 eV in the near UV region of the spectrum and a high exciton binding energy of 60 meV at room temperature [ 14 ]. Such unique characteristics of ZnO have attracted considerable interest from researchers in the scientific community with the prospect of its application in various electronic and optoelectronic devices.…”