纳米电化学和纳米传感用单胶体的模板溶解界面图案化
Template Dissolution Interfacial Patterning of Single Colloids for Nanoelectrochemistry and Nanosensing
摘要：
确定性的定位和组装的胶体纳米粒子（NPs）到基板上是一个核心的要求和一个有前途的替代自顶向下光刻创建功能的纳米结构和纳米器件与有趣的光学，电学和催化功能。为此，毛细管辅助颗粒组装（Capillary-assisted particle assembly，CAPA）已经成为一种有吸引力的技术，因为它允许使用毛细管力将各种各样的NP可控地和选择性地组装到预定义的形貌模板上。然而，CAPA的一个关键问题在于其最后的印刷步骤，其中只有使用粘合剂聚合物膜才可能实现高印刷产量。为了解决这个问题，我们已经开发了一种模板溶解界面图案化（TDIP）技术组装和印刷单个胶体金纳米粒子阵列到各种电介质和导电基板上的任何粘附层的情况下，印刷产率高于98%。TDIP方法允许直接进入AuNP和目标表面之间的界面，使得能够使用胶体AuNP作为实际应用的构建块。TDIP的多用途的适用性证明了直接的电结和光电化学和纳米粒子的镜面几何形状的单粒子分子传感的创建。
英文摘要：
Deterministic positioning and assembly of colloidal nanoparticles (NPs) onto substrates is a core requirement and a promising alternative to top down lithography to create functional nanostructures and nanodevices with intriguing optical, electrical, and catalytic features. Capillary-assisted particle assembly (CAPA) has emerged as an attractive technique to this end, as it allows controlled and selective assembly of a wide variety of NPs onto predefined topographical templates using capillary forces. One critical issue with CAPA, however, lies in its final printing step, where high printing yields are possible only with the use of an adhesive polymer film. To address this problem, we have developed a template dissolution interfacial patterning (TDIP) technique to assemble and print single colloidal AuNP arrays onto various dielectric and conductive substrates in the absence of any adhesion layer, with printing yields higher than 98%. The TDIP approach grants direct access to the interface between the AuNP and the target surface, enabling the use of colloidal AuNPs as building blocks for practical applications. The versatile applicability of TDIP is demonstrated by the creation of direct electrical junctions for electro- and photoelectrochemistry and nanoparticle-on-mirror geometries for single particle molecular sensing.
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