The Smallest Resonator Arrays in Atmosphere by Chip-Size-Grown Nanowires with Tunable Q-factor and Frequency for Subnanometer Thickness Detection

Abstract

A chip-size vertically aligned nanowire (NW) resonator arrays (VNRs) device has been fabricated with simple one-step lithography process by using grown self-assembled zinc oxide (ZnO) NW arrays. VNR has cantilever diameter of 50 nm, which breakthroughs smallest resonator record (>100 nm) functioning in atmosphere. A new atomic displacement sensing method by using atomic force microscopy is developed to effectively identify the resonance of NW resonator with diameter 50 nm in atmosphere. Size-effect and half-dimensional properties of the NW resonator have been systematically studied. Additionally, VNR has been demonstrated with the ability of detecting nanofilm thickness with subnanometer (<10(-9)m) resolution.

The Experiment and Simulation Method to Calibrate the Shear Modulus of Individual ZnO Nanorod

“…4(d)). In the previous report, 11 the shear modulus of ZnO nanorod is identified to 8.1 GPa with an error of 1.9 GPa. While, by simulation method, the shear modulus of the ZnO nanorod is deduced to be 9.1 GPa with a much smaller error of 0.2 GPa.…”

“…Figure 3(d) is the stress analysis figure of the twisted ZnO nanorod, which displays the entire forces on the ZnO nanorod for twisting it. 11 By analytical model under small angle approximation, the shear modulus of ZnO nanorod from experiment is 8.1 ± 1.9 GPa. However, as Figure 2(f) shows, the actual twisting curve is not as an ideal twisted nanorod model.…”

Recent advances in MXene-based force sensors: a mini-review

“…In addition, service life, linearity, hysteresis, and creep properties are the criteria for evaluating force sensors, and efforts should be made to optimize these properties while maximizing sensitivity, induction range, and response time. [50][51][52] The practicability of sensors is also a complex but powerful evaluation criterion. Appropriate volume, sufficient stability, and a wide working range are the criteria we need to consider.…”

“…In addition, service life, linearity, hysteresis, and creep properties are the criteria for evaluating force sensors, and efforts should be made to optimize these properties while maximizing sensitivity, induction range, and response time. 50–52 …”

Photoelectric Property Modulation by Nanoconfinement in the Longitude Direction of Short Semiconducting Nanorods

“…One-dimensional (1D) nanomaterials, like nanorods, nanowires, and nanotubes, have been widely investigated for their extraordinary mechanical, electric, piezoelectric, and photoelectrical properties, − which originate from the ultrahigh surface to volume ratio and quantum effects. Additionally, nanodevices with superior performance have been made possible by 1D nanomaterials. − Correspondingly, photoelectric property, one of the most important characteristics of semiconductors, undergoes significant change in 1D nanomaterials. For instance, the exposure of zinc oxide (ZnO) surfaces to light irradiation induces photodesorption of oxygen molecules from the surface, which leads to a rise of conductivity .…”