| Texto completo | |
| Autor(es): Mostrar menos - |
Jiang, Wenfeng
;
Qu, Zhi-bei
;
Kumar, Prashant
;
Vecchio, Drew
;
Wang, Yuefei
;
Ma, Yu
;
Bahng, Joong Hwan
;
Bernardino, Kalil
;
Gomes, Weverson R.
;
Colombari, Felippe M.
;
Lozada-Blanco, Asdrubal
;
Veksler, Michael
;
Marino, Emanuele
;
Simon, Alex
;
Murray, Christopher
;
Muniz, Sergio Ricardo
;
de Moura, Andr F.
;
Kotov, Nicholas A.
Número total de Autores: 18
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Science; v. 368, n. 6491, p. 80-pg., 2020-05-08. |
| Resumo | |
The structural complexity of composite biomaterials and biomineralized particles arises from the hierarchical ordering of inorganic building blocks over multiple scales. Although empirical observations of complex nanoassemblies are abundant, the physicochemical mechanisms leading to their geometrical complexity are still puzzling, especially for nonuniformly sized components. We report the self-assembly of hierarchically organized particles (HOPs) from polydisperse gold thiolate nanoplatelets with cysteine surface ligands. Graph theory methods indicate that these HOPs, which feature twisted spikes and other morphologies, display higher complexity than their biological counterparts. Their intricate organization emerges from competing chirality-dependent assembly restrictions that render assembly pathways primarily dependent on nanoparticle symmetry rather than size. These findings and HOP phase diagrams open a pathway to a large family of colloids with complex architectures and unusual chiroptical and chemical properties. (AU) | |
| Processo FAPESP: | 17/12063-8 - Dinâmica molecular de não-equilíbrio de líquidos iônicos |
| Beneficiário: | Kalil Bernardino |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 12/15147-4 - Estudo computacional da termodinâmica de associação de sistemas auto-organizados |
| Beneficiário: | André Farias de Moura |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 09/54035-4 - EMU: facility para estudos avançados de materiais nanoestruturados e biossistemas / FAMA |
| Beneficiário: | Igor Polikarpov |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |