High-throughput synthesis and phase transition characteristics controlling of VO2(M) nanoparticles via an orthogonal optimization route

Temperature-Switching Flexible Strain Sensors Based on Vanadium Dioxide for Intelligent Packaging Applications

“…Undoped VO 2 (B) nanobelts had an average width of approximately 100 nm, and the shape became increasingly irregular with higher amounts of W. As shown in Figure a, the morphology of undoped VO 2 (M) nanobelts changed slightly after annealing, which was attributed to the low annealing temperature of 500 °C. It has been noted in previous reports that a low annealing temperature results in a reduction in the size of nanomaterials. , After annealing, many fragments appeared in the samples of VO 2 -0.5-550 and VO 2 -1-650, and the nanobelts were observed to be broken (Figure b,c). After annealing at 750 °C, the sample of VO 2 -2-750 formed nanoflowers assembled from nanobelts.…”

“…Interestingly, vanadium dioxide (VO 2 ) materials undergo a reversible metal−insulator transition (MIT) at approximately 68 °C, changing from VO 2 (M) monoclinic crystal (M, P21/c) to VO 2 (R) rutile crystal (R, P42/mnm). 37 Due to significant changes in resistivity and optical performance across this phase transition, VO 2 is a promising candidate for sensors. co-workers prepared Ag nanoparticle-decorated VO 2 nanorods, which exhibited excellent selectivity and low operating temperatures, making them suitable as low-power gas sensors for detecting NO 2 at room temperature.…”

“…It has been noted in previous reports that a low annealing temperature results in a reduction in the size of nanomaterials. 37,42 After annealing, many fragments appeared in the samples of VO 2 -0.5-550 and VO 2 -1-650, and the nanobelts were observed to be broken (Figure 1b,c). After annealing at 750 °C, the sample of VO 2 -2-750 formed nanoflowers assembled from nanobelts.…”

“…Interestingly, vanadium dioxide (VO 2 ) materials undergo a reversible metal–insulator transition (MIT) at approximately 68 °C, changing from VO 2 (M) monoclinic crystal (M, P 21/ c ) to VO 2 (R) rutile crystal (R, P 42/ mnm ) . Due to significant changes in resistivity and optical performance across this phase transition, VO 2 is a promising candidate for sensors.…”

Flexible Strain Sensors Based on Direct-Writing VO2 Nanobelts Inks for Monitoring Human Motions and Human–Machine Interaction

“…Zhang and co-workers reported that the flexible piezoelectric nanogenerator (PENG) was fabricated with CdS nanowall arrays and successfully identified the index finger’s bending state at different angles, proving the great potential of semiconductor materials in flexible wearable sensing technology . As a semiconductor material with significant phase change properties, vanadium dioxide (VO 2 ) materials show dramatic changes in resistance, magnetism, infrared light transmission rate, and gas sensitivity across the phase change, which have been used in various sensors in previous reports. , Elango and co-workers used VO 2 -based thin film as thermal sensor, and it exhibited independent thermal response at different humidity levels and excellent response to temperatures over a wide temperature range of −100 to 100 °C, which achieved the sensing and monitoring of the surroundings by wearable devices . Liang and co-workers reported that the ultrathin VO 2 (B) vertical nanosheet arrays can be used for room temperature gas sensing measurements in the concentration range of 0.5–5 ppm for NO 2 , demonstrating the promising application of VO 2 (B) in the field of low power consumption gas sensors .…”