• 文献标题:   Graphene Quantum Dots in the Game of Directing Polymer Self-Assembly to Exotic Kagome Lattice and Janus Nanostructures
  • 文献类型:   Article
  • 作  者:   SHAKEEL A, BHATTACHARYA R, JEEVANANDHAM S, KOCHHAR D, SINGH A, MEHRA L, GHUFRAN M, GARG P, SANGAM S, BISWAS S, TYAGI A, KALYANASUNDARAM D, CHAKRABARTI S, MUKHERJEE M
  • 作者关键词:   graphene quantum dot, exotic nanostructure, kagome lattice, janus nanomicelle, gamma scintigraphy
  • 出版物名称:   ACS NANO
  • ISSN:   1936-0851 EI 1936-086X
  • 通讯作者地址:   Amity Univ
  • 被引频次:   2
  • DOI:   10.1021/acsnano.9b04188
  • 出版年:   2019

▎ 摘  要

Graphene quantum dots (GQDs) are the harbingers of a paradigm shift that revitalize self-assembly of the colloidal puzzle by adding shape and size to the material-design palette. Although self-assembly is ubiquitous in nature, the extent to which these molecular legos can be engineered reminds us that we are still apprenticing polymer carpenters. In this quest to unlock exotic nanostructures ascending from eventual anisotropy, we have utilized different concentrations of GQDs as a filler in free-radical-mediated aqueous copolymerization. Extensive polymer grafting over the geometrically confined landscape of GQDs (0.05%) bolsters crystallization instilling a loom which steers interaction of polymeric cilia into interlaced equilateral triangles with high sophistication. Such two-dimensional (2D) assemblies epitomizing the planar tiling of "Star of David" forming a molecular kagome lattice (KL) without metal templation evoke petrichor. Interestingly, a higher percentage (0.3%) of GQDs allow selective tuning of the interfacial property of copolymers breaking symmetry due to surface energy incongruity, producing exotic Janus nanomicelles (JNMs). Herein, with the help of a suite of characterizations, we delineate the mechanism behind the formation of the KL and JNMs which forms a depot of heightened drug accretion with targeted delivery of 5-fluorouracil in the colon as validated by gamma scintigraphy studies.