六边形化的纳米丝带的水诱导带隙工程
Chen Chen1,2,3, Yang Hang4, Hui Shan Wang1,2,3
1Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
Advanced materials (Deerfield Beach, Fla.)
|July 3, 2023
概括
水吸附显著减少了六边形化纳米丝带 (hBNNRs) 的带隙,使得可调节的电子特性. 这一突破为开发先进的电子和光电子设备提供了新的途径.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 六角化纳米带 (hBNNRs) 呈现可调节的带隙,与hBN板不同.
- 将电场应用于hBNNRs可以改变它们的带隙并诱导绝缘体-金属过渡.
- 在hBNNR中实验性地实现高电场是一个重大挑战.
研究的目的:
- 为了研究水吸附对齐克扎格导向的hBNNRs (zBNNRs) 带隙的影响.
- 展示一种用于调zBNNRs电子属性的新方法.
- 探索水吸附zBNNRs在电子和光电子应用中的潜力.
主要方法:
- Ab initio计算以建模水分子组合和电场感应.
- 使用zBNNRs制造场效应晶体管.
- 在室温下测量电导率.
- 测量光电流响应以确定光学带间隙.
主要成果:
- 水分子在相邻的zBNNR之间形成极地冰层,产生相当的横向电场 (>2V/nm).
- 这个字段大大减少了zBNNR带隙.
- 水吸附的zBNNR的导电性可以调整到三个数量级.
- 在更宽的zBNNR中观察到低至1.17 eV的光学带间距.
结论:
- 水吸附提供了一种有效的手段来调整zBNNRs的带隙.
- 来自水层的诱导电场模拟了高外部电场,克服了实验挑战.
- 这项研究为基于hBNNRs的新型电子和光电子设备铺平了道路.
相关概念视频
01:01Energy Bands in Solids
951
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
951
02:35Band Theory
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When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
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