Nanoparticles self-assembly controlled by interactions involving surfactants and polymers

• Grant number: 12/21930-3
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: February 01, 2013
• End date: October 31, 2015
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Watson Loh
• Grantee: Ana Maria Percebom Sette da Silva
• Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated scholarship(s): 14/01807-8 - Preparation, assembly and interfacial behavior of Janus gold nanoparticles, BE.EP.PD

Abstract

Directed self-assembly of nanoparticles is a new challenge in the field of nanotechnology, increasing the relevance of researches involving interparticle interactions and, as a consequence, making physical chemistry of colloids essential to nanoscience. In this context, the present project seeks applying the group's experience in physical chemistry of polymers and surfactants in solution in order to direct stabilization and aggregation of nanoparticles in dispersion, so that the individual and collective properties are explored in a controlled way. The employ of gold nanoparticles will provide interesting characteristics to the systems due to the optical and electronic properties related to localized surface plasmon resonance. Nanoparticles will be coated by a cationic surfactant and several polyelectrolytes - homo- or copolymers with different architectures. In addition to direct the self-assembly of nanoparticles, variations in polymer structure will be used to control characteristics of the formed cluster, such as ordering and interparticle distance, and properties of the systems, such as thermosensitivity. If the strategies succeed, one will be able to control optical and electronic properties of nanoparticles systems changing molecular structure of polymers used as coatings. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

FERNANDEZ-RODRIGUEZ, MIGUEL A.; PERCEBOM, ANA M.; GINER-CASARES, JUAN J.; RODRIGUEZ-VALVERDE, MIGUEL A.; CABRERIZO-VILCHEZ, MIGUEL A.; LIZ-MARZAN, LUIS M.; HIDALGO-ALVAREZ, ROQUE. Interfacial Activity of Gold Nanoparticles Coated with a Polymeric Patchy Shell and the Role of Spreading Agents. ACS OMEGA, v. 1, n. 2, p. 311-317, AUG 2016. (12/21930-3, 14/01807-8)

PERCEBOM, ANA M.; GINER-CASARES, JUAN J.; CLAES, NATHALIE; BALS, SARA; LOH, WATSON; LIZ-MARZAN, LUIS M.. Janus gold nanoparticles obtained via spontaneous binary polymer shell segregation. CHEMICAL COMMUNICATIONS, v. 52, n. 23, p. 4278-4281, 2016. (12/21930-3, 14/01807-8)