Affiliation:
1. Engineering Research Center of Polymer Green Recycling of Ministry of Education College of Environmental and Resource Sciences College of Carbon Neutral Modern Industry Fujian Normal University Fuzhou Fujian 350117 China
2. Beijing National Laboratory for Molecular Sciences (BNLMS) College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
3. Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei 230009 China
Abstract
AbstractThe creation of anisotropic nanostructures with precise size control is desirable for new properties and functions, but it is challenging for ionic self‐assembly (ISA) because of the non‐directional electrostatic interactions. Herein, the formation of size‐controllable tetragonal nanoprisms is reported via crystallization‐directed ionic self‐assembly (CDISA) through evaporating a micellar solution on solid substrates. First, ISA is designed with a crystalline polyethylene oxide (PEO) containing cationic polymer poly(2‐(2‐guanidinoethoxy)ethyl methacrylate)‐b‐poly(ethyleneoxide)‐b‐poly(2‐(2‐guanidinoethoxy)‐ethylmethacrylate) (PGn‐PEO230‐PGn) and an anionic 5,10,15,20‐Tetrakis(4‐sulfonatophenyl) porphyrin (TPPS) to form micelles in aqueous solution. The PG segments binds excessive TPPS with amplenet chargeto form hydrophilic corona, while the PEO segments are unprecedentedly dehydrated and tightly packed into cores. Upon naturally drying the micellar solution on a silicon wafer, PEO crystallizationdirects the micelles to aggregate into square nanoplates, which are further connected to nanoprisms. Length and width of the nanoprisms can be facilely tuned by varying the initial concentration. In this hierarchical process, the aqueous self‐assembly is prerequisite and the water evaporation rate is crucial for the formation of nanostructures, which provides multiple factors for morphology regulating. Such precise size‐control strategy is highly expected to provide a new vision for the design of advanced materials with size controllable anisotropic nanostructures.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry