Silica Nanoparticle/Polymer Film-Based Soft Mechanochromic Devices for Detecting Mechanical Deformation and Stress Cycles in Varied Environments

Autor(es)

de Castro, Lucas D. C. ; Oliveira, Osvaldo N., Jr.

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED NANO MATERIALS; v. 5, n. 2, p. 6-pg., 2022-01-26.

Resumo

We report on silica nanoparticle/polymer film-based soft mechanochromic devices with multilayered architecture displaying structural colors that are changed reversibly under deformation cycles. The tailored architecture leverages the mechanical robustness compatible with everyday applications with highly saturated structural colors, visible with naked eyes. The reflection peak for the devices is blue-shifted, with the elongation ratio from 0% (478 nm) to 15% (455 nm). For higher ratios, the peak asymptotes to the ultraviolet wavelength region. The device can be stretched, bended, or twisted, preserving its mechanical/functional integrity. Even after several stress cycles, a continuous color-shifting is easily observed, starting from small deformations at ca. 5% elongation. The mechanochromic devices can be used to detect mechanical deformation/stress cycles with naked eyes in varied environments, including outdoor areas exposed to natural sunlight or even underwater. (AU)

• Processo FAPESP: 20/02938-0 - Padrões coloridos baseados em cristais fotônicos bioinspirados para aplicações mecanocromáticas
• Beneficiário: Lucas Daniel Chiba de Castro
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 18/22214-6 - Rumo à convergência de tecnologias: de sensores e biossensores à visualização de informação e aprendizado de máquina para análise de dados em diagnóstico clínico
• Beneficiário: Osvaldo Novais de Oliveira Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático