Reconfigurable electronics by disassembling and reassembling van der Waals heterostructures

Abstract

Van der Waals heterostructures (vdWHs) have attracted tremendous interest owing to the ability to assemble diverse building blocks without the constraints of lattice matching and processing compatibility. However, once assembled, the fabricated vdWHs can hardly be separated into individual building blocks for further manipulation, mainly due to technical difficulties in the disassembling process. Here, we show a method to disassemble the as-fabricated vdWHs into individual building blocks, which can be further reassembled into new vdWHs with different device functionalities. With this technique, we demonstrate reconfigurable transistors from n-type to p-type and back-gate to dual-gate structures through re-stacking. Furthermore, reconfigurable device behaviors from floating gate memory to Schottky diode and reconfigurable anisotropic Raman behaviors have been obtained through layer re-sequencing and re-twisting, respectively. Our results could lead to a reverse engineering concept of disassembled vdWHs electronics in parallel with state-of-the-art vdWHs electronics, offering a general method for multi-functional pluggable electronics and optoelectronics with limited material building blocks.

Robotic Manipulation under Harsh Conditions Using Self‐Healing Silk‐Based Iontronics

“…For instance, based on specific characterizations, self‐healable silk‐based iontronic films can serve as tunable components in different reconfigurable devices and systems, which can then be triggered by external stimuli and change physical or output electrical signals to meet desired requirements (Figures S5–S7 and Notes S1 and S2, Supporting Information). [ 28–31 ]…”

“…For instance, based on specific characterizations, self-healable silk-based iontronic films can serve as tunable components in different reconfigurable devices and systems, which can then be triggered by external stimuli and change physical or output electrical signals to meet desired require-ments (Figures S5-S7 and Notes S1 and S2, Supporting Information). [28][29][30][31] The previously described silk-based iontronic devices, including self-healing strain sensors and reconfigurable circuit components, provide a foundation for an intelligent HMI system used for remote control of a robotic hand and for gesture/object recognition in various challenging conditions. As shown in the process diagram of Figure 3a, after collecting data from strain sensors mounted on both human and robotic hand joints (Figures S8 and S9, Supporting Information), a specified pattern recognition ANN was used for information processing, enabling accurate data classification.…”

Improvement of Porous GaN-Based UV Photodetector with Graphene Cladding

“…Graphene (partial), non−porous 1 Conductive silver paste was used as electrical contacts. 2 The graphene cladding is located on top of porous GaN only.…”

“…As-received Both ends Porous GaN/(Pr-GaN) Porous (partial), non-porous 2 CVD-graphene-GaN/CG-GaN Graphene (partial), non-porous 2 EC-graphene-GaN/EC-GaN Graphene (partial), non-porous 1 Conductive silver paste was used as electrical contacts. 2 The graphene cladding is located on top of porous GaN only.…”

“…Graphene is best described as a single layer of carbon atoms arranged hexagonally on a flat two-dimensional (2D) plane. It is also known as a zero-gap material with excellent electronic and thermal properties [1][2][3]. Several known methods such as chemical vapour deposition (CVD), electrochemical exfoliation (EC), Hummers, and so on have gained interest in the scientific community for graphene production [3][4][5][6][7][8][9][10][11].…”