Wafer-Scale Microwire Transistor Array Fabricated via Evaporative Assembly

Abstract

One-dimensional (1D) nano/microwires have attracted significant attention as promising building blocks for various electronic and optical device applications. The integration of these elements into functional device networks with controlled alignment and density presents a significant challenge for practical device applications. Here, we demonstrated the fabrication of wafer-scale microwire field-effect transistor (FET) arrays based on well-aligned inorganic semiconductor microwires (indium-gallium-zinc-oxide (IGZO)) and organic polymeric insulator microwires fabricated via a simple and large-area evaporative assembly technique. This microwire fabrication method offers a facile approach to precisely manipulating the channel dimensions of the FETs. The resulting solution-processed monolithic IGZO microwire FETs exhibited a maximum electron mobility of 1.02 cm(2) V(-1) s(-1) and an on/off current ratio of 1 × 10(6). The appropriate choice of the polymeric microwires used to define the channel lengths enabled fine control over the threshold voltages of the devices, which were employed to fabricate high-performance depletion-load inverters. Low-voltage-operated microwire FETs were successfully fabricated on a plastic substrate using a high-capacitance ion gel gate dielectric. The microwire fabrication technique involving evaporative assembly provided a facile, effective, and reliable method for preparing flexible large-area electronics.

Petal-Inspired Diffractive Grating on a Wavy Surface: Deterministic Fabrications and Applications to Colorizations and LED Devices

“…Also, it is noteworthy that the crosssectional height profile was not symmetric (referred to hereafter as a head-to-tail profile) due to imbalances between the velocity of the plastic blade motion and the evaporation rate of PDO 3 solution at the meniscus. 20,21 The inscription of the SRGs onto the pristine 1D wavy surface (i.e., holographic photofluidization) completed the development of the petal-inspired diffractive gratings. In general, even below the glass transition temperature (e.g., room temperature), the azobenzene materials can be soften, when irradiated by light with appropriate wavelength (referred to as athermal photofluidization).…”

Paper-based triboelectric nanogenerators and their applications: a review

“…Surface chemical modification (to introduce electronegative or electropositive functional groups) and micro-/nanostructure engineering (to introduce charge-trapping points to facilitate charge transfer) are effective ways to modulate the electronegativity. The surface modification of the friction materials is performed to implement chemical functionalization by using various molecules [72,93,94,[108][109][110][111][112][113], while surface engineering can be performed by introducing micro-/nanostructured patterns [74,92,[114][115][116][117][118][119][120][121] or porous structures [97,[122][123][124]. Feng et al [93] modified gum wrappers with polydopamine to improve the output voltage of TENGs by approx.…”

“…Recently, they have also been applied in various energy-related devices [66][67][68]. Although paper is intrinsically insulating, conductive materials (e.g., metal nanowires, con-ducting polymers, carbon nanotube (CNT) inks, multiwall carbon nanotube (MWCNT) inks, and reduced graphene oxide) [69][70][71][72][73][74][75][76][77][78][79][80][81][82], can be easily absorbed or used as a coating layer on the surface of the paper due to its wettability and moisture-retention capacity. This provides an efficient method to prepare paper electrodes for TENGs.…”

Design of Wavy Ag Microwire Array for Mechanically Stable, Multimodal Vibrational Haptic Interface

“…Toward this end, in this paper, we have reported a transparent, well‐defined wavy AgMW array derived from fractal patterns to achieve conformal skin contact and high areal coverage for maximum vibrational signal detectivity and mechanical stability. The large‐scale AgMW array structure has been engineered using an evaporative assembly method, such that additional patterning processes on either electrodes or the active vibration layer are not required . This method relies on controlling the stick–slip motions of a wavy metal blade by contacting a droplet of Ag nanoparticles' (AgNPs) dispersion.…”

“…This method relies on controlling the stick–slip motions of a wavy metal blade by contacting a droplet of Ag nanoparticles' (AgNPs) dispersion. In principle, this approach can produce a uniformly well‐aligned, wafer‐scale wire array on any arbitrary substrate . By maintaining precise control over the geometrical structures, the vibration intensity is maximized at the voltage frequency of 105 Hz, which is the lowest detection thresholds.…”