Role of annealing temperature on the sol–gel synthesis of VO₂ nanowires with in situ characterization of their metal–insulator transition

Abstract

The single-VO2 nanowire device synthesized via sequential morphological evolutions with oxygen reduction during annealing features a sharp metal-insulator transition.

Development of VO2‐Nanoparticle‐Based Metal–Insulator Transition Electronic Ink

“…[31] The SAED pattern has confirmed the polycrystalline phase of annealed VO 2 (M) nanoparticles, which is well matched with its corresponding XRD spectra and d-spacing value. [31] The SAED pattern has confirmed the polycrystalline phase of annealed VO 2 (M) nanoparticles, which is well matched with its corresponding XRD spectra and d-spacing value.…”

“…Due to the exciting applications mentioned above, considerable effort has been devoted to producing VO 2 (M) in the form of a thin film, primarily with a dry vapor process using chemical vapor deposition, sputtering, metalorganic molecular beam epitaxy deposition, pulsed laser deposition, e‐beam evaporation, and by electric field inducing ions migration . On the other hand, several bulk nanomaterials in solution processes with different shapes and sizes using sol–gel and hydrothermal synthesis are reported. The VO 2 thin‐film deposition techniques using dry vapor processes require an ultrahigh level of vacuum conditions (10 −6 Torr) and sometimes very high processing temperatures (400–600 °C).…”

“…[10,12] This makes VO 2 a promising material for many practical applications, including sensors, [15] thermochromic smart windows, [16] field effect transistors, [17] radio-frequency (RF) switches, [18] terahertz nanoantennas, [19] reconfigurable antennas, [20] memory, [21] and energy. [30] On the other hand, several bulk nanomaterials in solution processes with different shapes and sizes using sol-gel [31] and hydrothermal synthesis [32] are reported. [30] On the other hand, several bulk nanomaterials in solution processes with different shapes and sizes using sol-gel [31] and hydrothermal synthesis [32] are reported.…”

“…[30] On the other hand, several bulk nanomaterials in solution processes with different shapes and sizes using sol-gel [31] and hydrothermal synthesis [32] are reported. [31] With the surge in inkjet printing, which is extremely low cost, completely digital, and highly suitable for rapid prototyping or large-scale manufacturing, realizing VO 2 film through inkjet The metal-insulator transition (MIT) phase change of vanadium dioxide (VO 2 ) materials has facilitated many exciting applications. The process also requires expensive masks and nanolithography for device prototyping.…”

Structural, morphological, and optical properties of W‐doped VO2 thin films prepared by sol‐gel spin coating method

“…In the present research, VO 2 sol was coated on soda‐lime glass substrate via a low‐cost sol‐gel spin coating method followed by gelation during thin film drying process. Sol‐gel process has been widely used in the fabrication of thermochromic thin films, however, thermochromic coating on soda‐lime glass by sol‐gel spin coating process was less investigated. Since tungsten is the most common dopant for reducing transition temperature of VO 2 , the main purpose of this research is to profoundly study the changes in VO 2 electrical and optical properties by W‐doping which was done by adding a less investigated dopant precursor (tungstic acid) to the VO 2 precursor solution.…”