Electrospun single-crystal MoO₃ nanowires for biochemistry sensing probes

Abstract

Single-crystal MoO3 nanowires were produced using the electrospinning technique. High-resolution transmission electron microscopy revealed that the one-dimensional nanostructures are 10–50 nm in diameter, on the order of 1–2 μm in length, and have the orthorhombic MoO3 structure. The structure, crystallinity, and sensoric character of these electrostatically processed nanowires are discussed. It has been demonstrated that the nonwoven network of MoO3 nanowires exhibits an order of magnitude higher sensitivity compared with that of a sol-gel based sensor. This is promising for use of the nanowire sensors in nanomedicine.

ZnO nanoparticles or ZnO films: A comparison of the gas sensing capabilities

“…A multitude of metal oxides can potentially be used for these types of sensors, including tin, indium, titanium and zinc oxides. The metal oxide surfaces of these materials also exhibit good long-term stability while operating under physiological conditions [9]. Other examples of well established sensor technologies, which recently have benefitted from nanotechnology implemented in sensing layers are field effect sensors [10] and quartz crystal microbalance, QCM, sensors [11].…”

Incorporation of Conductive Materials into Hydrogels for Tissue Engineering Applications

“…It is important that the metallic particles incorporated in hydrogels form interconnecting pathways of particles for electron transfer without compromising the physical properties of the hydrogel [123]. Although it is difficult for a network of nanowires to control uniform distribution [124][125][126][127][128][129][130], conductive hydrogels with nanowires can be fabricated for a wide range of tissue engineering fields, such as pressure sensors, biosensors, and electrophysiological catheters [131][132][133]. Conductive materials, such as CNT and graphene can cause structural defects when mixed with polymers in the development of conductive hydrogels [121,134].…”

Processing and Characterization of Nanostructured Metal Oxides for Gas Sensing Applications

“…The most common synthesis routes for nanostructured MoO 3 thin film sensors are sputtering and sol-gel as can be seen from table 3. But in order to produce novel 2D nanoassemblies our group has used a novel approach (53) (54) to produce single crystalline, one dimensional nanowires. It is a single step process that makes use of electrospinning to produce a polymer/metal oxide nanocomposite fibrous mat (53) .…”