金属离子对混合石墨-金刚石纳米线生长的影响：来自单个纳米线器件的电导率测量

Effect of Metal Ions on Hybrid Graphite-Diamond Nanowire Growth: Conductivity Measurements from a Single Nanowire Device.

作者信息

Shellaiah Muthaiah, Chen Ying-Chou, Simon Turibius, Li Liang-Chen, Sun Kien Wen, Ko Fu-Hsiang

机构信息

Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan.

Department of Electronics Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.

出版信息

Nanomaterials (Basel). 2019 Mar 11;9(3):415. doi: 10.3390/nano9030415.

DOI:10.3390/nano9030415

PMID:30862083

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6473948/

Abstract

Novel Cd ions mediated reproducible hybrid graphite-diamond nanowire (G-DNWs; Cd- NW) growth from 4-Amino-5-phenyl-4H-1,2,4-triazole-3-thiol ( functionalized diamond nanoparticles () via supramolecular assembly is reported and demonstrated through TEM and AFM images. FTIR, EDX and XPS studies reveal the supramolecular coordination between functional units of and Cd ions towards NWs growth. Investigations of XPS, XRD and Raman data show the covering of graphite sheath over DNWs. Moreover, HR-TEM studies on Cd- NW confirm the coexistence of less perfect sp² graphite layer and sp³ diamond carbon along with impurity channels and flatten surface morphology. Possible mechanisms behind the G-DNWs growth are proposed and clarified. Subsequently, conductivity of the as-grown G-DNWs is determined through the fabrication of a single Cd- NW device, in which the G-DNW portion L2 demonstrates a better conductivity of 2.31 × 10 mS/cm. In addition, we investigate the temperature-dependent carrier transport mechanisms and the corresponding activation energy in details. Finally, comparisons in electrical resistivities with other carbon-based materials are made to validate the importance of our conductivity measurements.

摘要

报道了通过超分子组装，新型镉离子介导从4-氨基-5-苯基-4H-1,2,4-三唑-3-硫醇（功能化金刚石纳米颗粒）可重复生长杂化石墨-金刚石纳米线（G-DNWs；Cd-NW），并通过透射电子显微镜（TEM）和原子力显微镜（AFM）图像进行了证明。傅里叶变换红外光谱（FTIR）、能量散射X射线光谱（EDX）和X射线光电子能谱（XPS）研究揭示了与镉离子的功能单元之间对纳米线生长的超分子配位。XPS、X射线衍射（XRD）和拉曼数据的研究表明在双纳米线（DNWs）上覆盖有石墨鞘。此外，对Cd-NW的高分辨率透射电子显微镜（HR-TEM）研究证实了不太完美的sp²石墨层和sp³金刚石碳与杂质通道以及扁平表面形态共存。提出并阐明了G-DNWs生长背后的可能机制。随后，通过制造单个Cd-NW器件来测定生长的G-DNWs的电导率，其中G-DNW部分L2表现出2.31×10 mS/cm的更好电导率。此外，我们详细研究了温度依赖性载流子传输机制和相应的活化能。最后，与其他碳基材料的电阻率进行比较，以验证我们电导率测量的重要性。