Enhanced optical asymmetry in supramolecular chiroplasmonic assemblies with long-range order

Autor(es):Mostrar menos -

Lu, Jun ^{[1, 2, 3]} ; Xue, Yao ^[3] ; Bernardino, Kalil ^[4] ; Zhang, Ning-Ning ^[3] ; Gomes, Weverson R. ^[5] ; Ramesar, Naomi S. ^{[6, 1]} ; Liu, Shuhan ^[7] ; Hu, Zheng ^[7] ; Sun, Tianmeng ^[7] ; de Moura, Andre Farias ^[5] ; Kotov, Nicholas A. ^{[6, 1, 2]} ; Liu, Kun ^{[3, 8, 9]}

Afiliação do(s) autor(es)

^[1] Univ Michigan, Biointerfaces Inst, Ann Arbor, MI 48109 - USA

^[2] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 - USA

^[3] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun, Jilin - Peoples R China

^[4] Univ Sao Paulo, Inst Chem, BR-05508000 Sao Paulo, SP - Brazil

^[5] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[6] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 - USA

^[7] Jilin Univ, Hosp 1, Inst Immunol, Key Lab Organ Regenerat & Transplantat, Minist Edu, Changchun - Peoples R China

^[8] Jilin Univ, Hosp 1, Opt Funct Theranost Joint Lab Med & Chem, Changchun - Peoples R China

^[9] Jilin Univ, Chiral Nanomat Res Ctr, Int Ctr Future Sci, Changchun - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: Science; v. 371, n. 6536, p. 1368+, MAR 26 2021.
• Citações Web of Science: 1

Resumo

Chiral assemblies of plasmonic nanoparticles are known for strong circular dichroism but not for high optical asymmetry, which is limited by the unfavorable combination of electrical and magnetic field components compounded by strong scattering. Here, we show that these limitations can be overcome by the long-range organization of nanoparticles in a manner similar to the liquid crystals and found in helical assemblies of gold nanorods with human islet amyloid polypeptides. A strong, polarization-dependent spectral shift and the reduced scattering of energy states with antiparallel orientation of dipoles activated in assembled helices increased optical asymmetry g-factors by a factor of more than 4600. The liquid crystal-like color variations and the nanorod-accelerated fibrillation enable drug screening in complex biological media. Improvement of long-range order can also provide structural guidance for the design of materials with high optical asymmetry. (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