Functionalization of MoS2 and WS2 sulfide nanotubes: From controlled synthesis to organized assembly and function

MoS2 和 WS2 硫化物纳米管的功能化：从受控合成到有组织的组装和功能

• 批准号: 26108932
• 负责人: Professor Dr. Wolfgang Tremel
• 金额: --
• 依托单位: Department Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/26108932?language=en
• 关键词: Functionalization; MoS2; WS2; sulfide; nanotubes

ObjectivesThis project deals with the functionalization of chalcogenide nanotubes with organic and polymer ligands in order to(i) tailor the solubilities of chalcogenide nanotubes in various polar or unpolar solvents and/or to integrate them into inorganic/polymer hybrid structures,(ii) to bind photoexcitable or redoxactive ligands (e.g. metalloporphyrins for light harvesting) to the sidewalls of the tubes,(in) to attach nanoparticles such as metal (Au, Ag), semiconductor (ZnS, CdSe) particles to the sidewall of the tubes,(iv) to fabricate thin films from MoSa nanotubes on oxidic or ceramic surfaces and to produce layer-by-layer assembled composites from MoS2 and/or WS2 nanotubes and poiyelectrolytes,(v) attach ligands to the surface in order to build up organized assemblies of chalcogenide nanotubes.The proposed research will focus on MoS2 and WS2 nanotubes, which are available in sufficient amounts and quality.Methods and plan of operationThe functionalization strategy is based on tripod or tetrapod ligands which are bonded to the outer surface layer of the chalcogenide tube by transition metals (Ni2+ or Co2+) which act as a glue for the attachment of the ligand. The multiped ligand carries a linker group for the attachment of other functional molecules or nanoparticles and a spacer group for adjusting the separation between the nanotube and the particles or molecules attached. The multipod ligand can be attached as a sidegroup to the backbone of a block copolymer, where the second side group carries the functional ligands are acts as an anchor group for metal or semiconductor particles. The advantage of the polymer ligand approach is that the nanotube/ligand complex do not rely on the stability of a single bond but rather on multifunctional docking. The validity of this approach has been demonstrated with nitrilotriacetic acid (NTA) on fullerene-type MoSz nanoparticles.Significance of the proposed researchSuccessful performance of this research will provide a general methodology for a designed chemical modification of chalcogenide nanoparticles, which are of special interest for their lubricating and s hock-absorbing (MoS2, WSn) and electronic properties (NbS2, NbSe2).

本项目涉及具有有机和聚合物配体的硫化物纳米管的功能化，以便(I)定制硫化物纳米管在各种极性或非极性溶剂中的溶解性和/或将它们集成到无机/聚合物杂化结构中，(Ii)将可光激发或氧化还原的配体(例如用于捕光的金属卟啉)结合到管的侧壁，(In)将诸如金属(Au，Ag)、半导体(ZnS，CdSe)颗粒的纳米颗粒附着到管的侧壁，(4)在氧化物或陶瓷表面由MoS_2纳米管制备薄膜，并由MoS_2和/或WS_2纳米管和聚电解质形成层层组装的复合材料，(V)将配体连接到表面以形成硫化物纳米管的有序组装。拟议的研究将集中在MoS_2和WS_2纳米管上，这些纳米管有足够的数量和质量。操作方法和计划功能化策略基于三脚或四脚配体，它们通过过渡金属(Ni2+或Co2+)作为粘合剂连接到硫系化合物管的外表面层。该多配位配体带有用于连接其他功能分子或纳米颗粒的连接基和用于调节纳米管与所连接的颗粒或分子之间的间隔的间隔基。多POD配体可以作为侧基连接到嵌段共聚物的主干上，其中第二侧基携带功能配体充当金属或半导体粒子的锚基。聚合物配体方法的优点是纳米管/配体复合体不依赖于单键的稳定性，而是依赖于多官能团的对接。这项研究的成功将为硫化物纳米粒子的化学修饰提供一种通用的方法，硫化物纳米粒子具有特殊的润滑性和S霍克吸收(MoS_2，WSN)和电子性质(NbS_2，NbSe_2)。