Electronically Coupled, Two-Dimensional Assembly of Cu1.1S Nanodiscs for Selective Vapor Sensing Applications
Electronically Coupled, Two-Dimensional Assembly of Cu1.1S Nanodiscs for Selective Vapor Sensing Applications
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DOI：
10.1021/acs.jpcc.8b05276
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发表时间：
2018-09
期刊：
影响因子：
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通讯作者：
S. Maiti;S. Maiti;Yvonne Joseph;A. Wolf;W. Brütting;Dirk Dorfs;F. Schreiber;Marcus Scheele
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文献类型：
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作者：
S. Maiti;S. Maiti;Yvonne Joseph;A. Wolf;W. Brütting;Dirk Dorfs;F. Schreiber;Marcus Scheele
我们研究了covelite晶体相（Cu1.1S）中硫化铜纳米片二维组件中温度相关的电荷输运。为了增强粒子间的耦合，我们将纳米晶体与有机π系cu -4,4′，4″，4 μ l -四氨基眼青碱交联，观察到电导率提高了6个数量级。该杂化系综的单层电学性质与二维半导体一致，并在离散温度（120和210 K）下表现出两次突变，这可能被解释为相变。x射线散射实验研究了有机π系中电子共轭与粒子间间距对有效电荷输运的重要性。将杂化系综作为化学电阻器应用于有机气敏实验，揭示了极性和非极性分析物之间有很强的选择性，并结合有机π体系及其金属中心的作用进行了讨论。
We study temperature-dependent charge transport in two-dimensional assemblies of copper sulfide nanodiscs in the covellite crystal phase (Cu1.1S). To enhance interparticle coupling, we cross-link the nanocrystals with the organic π-system Cu-4,4′,4″,4‴-tetraaminophthalocyanine and observe an increase in the conductivity by 6 orders of magnitude. The electrical properties of monolayers of this hybrid ensemble are consistent with a two-dimensional semiconductor and exhibit two abrupt changes at discrete temperatures (120 and 210 K), which may be interpreted as phase changes. X-ray scattering experiments serve to study the importance of electronic conjugation in the organic π-system vs interparticle spacing for efficient charge transport. Applying the hybrid ensemble as a chemiresistor in organic vapor sensing experiments reveals a strong selectivity between polar and nonpolar analytes, which we discuss in light of the role of the organic π-system and its metal center.