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Ultrathin One-Dimensional Molybdenum Telluride Quantum Wires Synthesized by Chemical Vapor Deposition
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-10-30 , DOI: 10.1021/acs.chemmater.0c03264 Youngdong Yoo 1 , Jong Seok Jeong 2, 3 , Rui Ma 4 , Steven J. Koester 4 , James E. Johns 5
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-10-30 , DOI: 10.1021/acs.chemmater.0c03264 Youngdong Yoo 1 , Jong Seok Jeong 2, 3 , Rui Ma 4 , Steven J. Koester 4 , James E. Johns 5
Affiliation
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One-dimensional (1D) transition-metal chalcogenides (TMCs) are attracting increasing scientific and technological interest, especially for ultrasmall electronic interconnects and highly active catalysts. However, it is quite challenging to synthesize high-quality 1D TMCs over large areas on substrates. Here, we report on an atmospheric-pressure vapor-phase synthetic strategy for growing ultrathin 1D Mo6Te6 wires on various substrates such as Si3N4, SiO2, and doped SiC, employing double MoO3 sources. Scanning transmission electron microscopy confirms that the ultrathin 1D Mo6Te6 wires possessing thicknesses of 3–5 nm grow laterally to form wire networks. Lattice-resolution electron energy loss spectroscopy mapping clearly shows intensity variations of Mo-M4,5 and Te-M4,5 signals originating from Mo and Te atoms in the monoclinic Mo6Te6 structure. Furthermore, we investigate the vibrational modes of 1D Mo6Te6 wire networks, confirming that the two characteristic Raman peaks at 155 and 245 cm–1 are associated with resonance Raman scattering. The 1D Mo6Te6 wire networks not only possess excellent transparency in the near-infrared range but also are electrically conductive. They also exhibit temperature-dependent Hall effects. We believe that these ultrathin 1D Mo6Te6 wires are auspicious materials for future electronics and catalysis.
中文翻译：
化学气相沉积法合成超细一维碲化钼量子线
一维（1D）过渡金属硫族化物（TMC）吸引了越来越多的科学技术兴趣，特别是对于超小型电子互连和高活性催化剂。但是，要在基板上的大面积上合成高质量的一维TMC非常困难。在这里，我们报告了一种常压气相合成策略，该方法利用双MoO 3源在诸如Si 3 N 4，SiO 2和掺杂SiC的各种衬底上生长超细1D Mo 6 Te 6线。扫描透射电子显微镜证实超薄1D Mo 6 Te 6厚度为3-5 nm的金属丝横向生长形成金属丝网络。晶格分辨率电子能量损失谱图清楚地显示了源自单斜Mo 6 Te 6结构中Mo和Te原子的Mo-M 4,5和Te-M 4,5信号的强度变化。此外，我们研究了1D Mo 6 Te 6线网的振动模式，证实了在155和245 cm –1处的两个特征拉曼峰与共振拉曼散射有关。一维Mo 6 Te 6有线网络不仅在近红外范围内具有出色的透明度，而且具有导电性。它们还表现出与温度有关的霍尔效应。我们认为，这些超细1D Mo 6 Te 6导线是用于未来电子和催化的吉祥材料。
更新日期：2020-11-25
中文翻译：
化学气相沉积法合成超细一维碲化钼量子线
一维（1D）过渡金属硫族化物（TMC）吸引了越来越多的科学技术兴趣，特别是对于超小型电子互连和高活性催化剂。但是，要在基板上的大面积上合成高质量的一维TMC非常困难。在这里，我们报告了一种常压气相合成策略，该方法利用双MoO 3源在诸如Si 3 N 4，SiO 2和掺杂SiC的各种衬底上生长超细1D Mo 6 Te 6线。扫描透射电子显微镜证实超薄1D Mo 6 Te 6厚度为3-5 nm的金属丝横向生长形成金属丝网络。晶格分辨率电子能量损失谱图清楚地显示了源自单斜Mo 6 Te 6结构中Mo和Te原子的Mo-M 4,5和Te-M 4,5信号的强度变化。此外，我们研究了1D Mo 6 Te 6线网的振动模式，证实了在155和245 cm –1处的两个特征拉曼峰与共振拉曼散射有关。一维Mo 6 Te 6有线网络不仅在近红外范围内具有出色的透明度，而且具有导电性。它们还表现出与温度有关的霍尔效应。我们认为，这些超细1D Mo 6 Te 6导线是用于未来电子和催化的吉祥材料。
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