Scholarlink

<p>Molecular intercalation-based electrochemical exfoliation of two-dimensional (2D) materials can be used to create van der Waals heterostructures. However, the scalable assembly of vertical heterostructures typically requires the use of various chemical solvents for photolithography and subsequent transfer, which can leave behind chemical residues and limit the patterning resolution. We show that patterned van der Waals heterostructures can be fabricated from electrochemically exfoliated 2D flakes using a photoreactive crosslinker. When a 2D van der Waals percolated network with the crosslinker is exposed to ultraviolet light, the network junctions form covalent bonds, thereby enabling improved charge transport and orthogonal patterning of vertically stacked van der Waals thin-film networks without affecting the underlying prepatterned layers. Our approach can be used to create wafer-scale arrays of photopatterned field-effect transistors based on different 2D materials. The field-effect transistors exhibit high spatial uniformity and can be used to create logic gates, namely NOT, NAND and NOR gates.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Orthogonal photopatterning of two-dimensional percolated network films for wafer-scale heterostructures

  • 期刊论文

  • 发表日期：

    2025年2月24日

查看全文
  • In Cheol Kwak,
  • Jihyun Kim,
  • Jung Woo Moon,
  • Seonkwon Kim,
  • Ji Yun Park,
  • Okin Song,
  • Vlastimil Mazánek,
  • Zdeněk Sofer,
  • Hyunwoo Jo,
  • Se Young Park,
  • Moon Sung Kang,
  • Joohoon Kang,
  • Jeong Ho Cho

摘要

Molecular intercalation-based electrochemical exfoliation of two-dimensional (2D) materials can be used to create van der Waals heterostructures. However, the scalable assembly of vertical heterostructures typically requires the use of various chemical solvents for photolithography and subsequent transfer, which can leave behind chemical residues and limit the patterning resolution. We show that patterned van der Waals heterostructures can be fabricated from electrochemically exfoliated 2D flakes using a photoreactive crosslinker. When a 2D van der Waals percolated network with the crosslinker is exposed to ultraviolet light, the network junctions form covalent bonds, thereby enabling improved charge transport and orthogonal patterning of vertically stacked van der Waals thin-film networks without affecting the underlying prepatterned layers. Our approach can be used to create wafer-scale arrays of photopatterned field-effect transistors based on different 2D materials. The field-effect transistors exhibit high spatial uniformity and can be used to create logic gates, namely NOT, NAND and NOR gates.