Two-dimensional(2D)materials showcase great potentials in both fundamental research and technology development,thanks to their unique chemical and physical properties that are usually not available in corresponding bu...Two-dimensional(2D)materials showcase great potentials in both fundamental research and technology development,thanks to their unique chemical and physical properties that are usually not available in corresponding bulk counterparts.As an emerging class of 2D materials,2D conductive metal-organic frameworks(2D c-MOFs)exhibit the characteristics of pre-designable and tunable structures,excellent crystallinity,intrinsic porosity and superior conductivity.During the past decade,2D c-MOFs have been rapidly developed in electronics,sensors,energy storage devices,etc.In this review,the electrical,magnetic and quantum properties of 2D c-MOFs are surveyed in detail.Their applications in semiconductor,metal,superconductor,topological insulator and porous magnet are highlighted.We envision that the combination of 2D c-MOFs with quantum materials could evoke rich physics,flexible chemistry and potential applications in both electronics and spintronics.展开更多
We prepared conducting polyaniline （PAn） co-doped with sulfosalicylic acid （SSA） and dodecylbenzoyl sultonic acid （DBSA） in micro-emulsive polymerization, and studied its charge transport behaviors based on the ...We prepared conducting polyaniline （PAn） co-doped with sulfosalicylic acid （SSA） and dodecylbenzoyl sultonic acid （DBSA） in micro-emulsive polymerization, and studied its charge transport behaviors based on the measurement of its electrical conductivity in the temperature range between 203 K and 298 K. The conductivity was found to increase with temperature, similar to the case in semiconductors. Analyzing the experimental data with three models, namely the charge-energy-limitedtunneling model, Kivelson model and the three-dimensional variable range hopping （3D-VRH） model demonstrated that these models all describe well the charge transport behaviors of PAn co-doped with SSA and DBSA within the mentioned temperature range. From calculation with the 3D-VRH model, the hopping distance of the conducting PAn is obviously larger than its localization length. The PAn doped with SSA and DBSA enjoys desirable crystallinity due to the co-doping of two functional sulfonic acids. The macroscopic conductivity may correspond to three-dimensional transport in the network of the bundles, and the metallic islands may be attributed to quasi-one-dimensional bundles.展开更多
将超导电炭黑和普通炭黑分别填充到乙烯-丙烯酸乙酯中(EEA)中,制备了电阻率相同的半导电屏蔽材料,测试其力学性能、体积电阻率以及空间电荷性能,分析超导电炭黑复合半导电屏蔽材料对直流电缆绝缘材料空间电荷注入的影响,并与国外±5...将超导电炭黑和普通炭黑分别填充到乙烯-丙烯酸乙酯中(EEA)中,制备了电阻率相同的半导电屏蔽材料,测试其力学性能、体积电阻率以及空间电荷性能,分析超导电炭黑复合半导电屏蔽材料对直流电缆绝缘材料空间电荷注入的影响,并与国外±500 k V直流电缆半导电屏蔽材料的性能进行对比。结果表明:高结构的超导电炭黑聚集体直径较小、表观密度小,在添加量较少时,其在EEA中分布较常规导电炭黑密集,粒子间距小,所得半导电屏蔽材料作为电极时,直流绝缘材料中空间电荷注入量较小。展开更多
基金supported by the National Key Research and Development Program of China(2017YFA0207500)the National Natural Science Foundation of China(51973153)the Natural Science Foundation of Tianjin City(17JCJQJC44600)。
文摘Two-dimensional(2D)materials showcase great potentials in both fundamental research and technology development,thanks to their unique chemical and physical properties that are usually not available in corresponding bulk counterparts.As an emerging class of 2D materials,2D conductive metal-organic frameworks(2D c-MOFs)exhibit the characteristics of pre-designable and tunable structures,excellent crystallinity,intrinsic porosity and superior conductivity.During the past decade,2D c-MOFs have been rapidly developed in electronics,sensors,energy storage devices,etc.In this review,the electrical,magnetic and quantum properties of 2D c-MOFs are surveyed in detail.Their applications in semiconductor,metal,superconductor,topological insulator and porous magnet are highlighted.We envision that the combination of 2D c-MOFs with quantum materials could evoke rich physics,flexible chemistry and potential applications in both electronics and spintronics.
文摘We prepared conducting polyaniline （PAn） co-doped with sulfosalicylic acid （SSA） and dodecylbenzoyl sultonic acid （DBSA） in micro-emulsive polymerization, and studied its charge transport behaviors based on the measurement of its electrical conductivity in the temperature range between 203 K and 298 K. The conductivity was found to increase with temperature, similar to the case in semiconductors. Analyzing the experimental data with three models, namely the charge-energy-limitedtunneling model, Kivelson model and the three-dimensional variable range hopping （3D-VRH） model demonstrated that these models all describe well the charge transport behaviors of PAn co-doped with SSA and DBSA within the mentioned temperature range. From calculation with the 3D-VRH model, the hopping distance of the conducting PAn is obviously larger than its localization length. The PAn doped with SSA and DBSA enjoys desirable crystallinity due to the co-doping of two functional sulfonic acids. The macroscopic conductivity may correspond to three-dimensional transport in the network of the bundles, and the metallic islands may be attributed to quasi-one-dimensional bundles.
文摘将超导电炭黑和普通炭黑分别填充到乙烯-丙烯酸乙酯中(EEA)中,制备了电阻率相同的半导电屏蔽材料,测试其力学性能、体积电阻率以及空间电荷性能,分析超导电炭黑复合半导电屏蔽材料对直流电缆绝缘材料空间电荷注入的影响,并与国外±500 k V直流电缆半导电屏蔽材料的性能进行对比。结果表明:高结构的超导电炭黑聚集体直径较小、表观密度小,在添加量较少时,其在EEA中分布较常规导电炭黑密集,粒子间距小,所得半导电屏蔽材料作为电极时,直流绝缘材料中空间电荷注入量较小。
