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Penelas MJ, Arenas GF, Trabadelo F, Soler-Illia GJAA, Moya SE, Angelomé PC, Hoppe CE. Importance of the Structural and Physicochemical Properties of Silica Nanoshells in the Photothermal Effect of Silica-Coated Au Nanoparticles Suspensions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3876-3886. [PMID: 35302776 DOI: 10.1021/acs.langmuir.2c00127] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, monodisperse silica-coated gold nanoparticles (NPs) were synthesized and used for obtaining aqueous colloidal dispersions with an optimum relationship between colloidal stability and photothermal activity. The idea behind this design was to produce systems with the advantages of the presence of a silica shell (biocompatibility, potential for surface modification, and protecting effect) with a minimal loss of optical and thermal properties. With this aim, the photothermal properties of NPs with silica shells of different thicknesses were analyzed under conditions of high radiation extinction. By using amorphous, gel-like silica coatings, thicknesses higher than 40 nm could be obtained without an important loss of the light absorption capacity of the colloids and with a significant photothermal response even at low NP concentrations. The effects produced by changes in the solvent and in the NP concentration were also analyzed. The results show that the characteristics of the shell control both, the photothermal effect and the optical properties of the colloidal dispersions. As the presence of a silica shell strongly enhances the possibilities of adding cargo molecules or probes, these colloids can be considered of high interest for biomedical therapies, sensing applications, remote actuation, and other technological applications.
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Affiliation(s)
- M Jazmín Penelas
- División Polímeros Nanoestructurados, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), UNMdP-CONICET y Departamento de Química, UNMdP, Av. Cristóbal Colón 10850, B7606BWV Mar del Plata, Buenos Aires, Argentina
- Instituto de Nanosistemas, Universidad Nacional de San Martín, Av. 25 de Mayo 1021, San Martín, B1650 Buenos Aires, Argentina
| | - Gustavo F Arenas
- Laboratorio LASER, ICYTE, UNMdP-CONICET, Av. J. B. Justo 4302, B7608FDQ Mar del Plata, Buenos Aires, Argentina
| | - Fernando Trabadelo
- Laboratorio de Electrónica, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), UNMdP-CONICET,Av. Cristóbal Colón 10850, B7606BWV, Mar del Plata, Buenos Aires, Argentina
| | - Galo J A A Soler-Illia
- Instituto de Nanosistemas, Universidad Nacional de San Martín, Av. 25 de Mayo 1021, San Martín, B1650 Buenos Aires, Argentina
| | - Sergio E Moya
- CIC biomaGUNE, Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain
| | - Paula C Angelomé
- Gerencia Química & INN, CAC, CNEA-CONICET, Av. General Paz 1499, 1650, San Martín, Buenos Aires, Argentina
| | - Cristina E Hoppe
- División Polímeros Nanoestructurados, Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), UNMdP-CONICET y Departamento de Química, UNMdP, Av. Cristóbal Colón 10850, B7606BWV Mar del Plata, Buenos Aires, Argentina
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Luo GF, Chen WH, Zhang XZ. 100th Anniversary of Macromolecular Science Viewpoint: Poly( N-isopropylacrylamide)-Based Thermally Responsive Micelles. ACS Macro Lett 2020; 9:872-881. [PMID: 35648534 DOI: 10.1021/acsmacrolett.0c00342] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Poly(N-isopropylacrylamide) (PNIPAAm)-based thermally responsive micelles are of great importance as smart materials for a number of applications such as drug delivery and biosensing, owing to their tunable lower critical solution temperature (LCST). Their design and synthesis in the nanoscale size range have been widely studied, and research interest in their structural and physic-chemical properties is continually growing. In this Viewpoint, representative research on the construction of PNIPAAm-based thermally responsive micelles as well as their applications are highlighted and discussed, which would serve as a good start for newcomers in this field and a positive guide for future research.
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Affiliation(s)
- Guo-Feng Luo
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan 430072, People’s Republic of China
| | - Wei-Hai Chen
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan 430072, People’s Republic of China
| | - Xian-Zheng Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan 430072, People’s Republic of China
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