Tunable surface plasmon resonance enhanced fluorescence via the stretching of a gold quantum dot-coated aluminum-coated elastomeric grating substrate
Tunable surface plasmon resonance enhanced fluorescence via the stretching of a gold quantum dot-coated aluminum-coated elastomeric grating substrate
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通过拉伸金量子点镀铝弹性光栅基底可调谐表面等离子体共振增强荧光
DOI：
10.1039/d2ay00893a
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发表时间：
2022
影响因子：
3.1
通讯作者：
Akira Baba
中科院分区：
文献类型：
--
作者：
Patrawadee Yaiwong;Chutiparn Lertvachirapaiboon;Kazunari Shinbo;Keizo Kato;Kontad Ounnunkad;Akira Baba
在这项研究中，通过机械拉伸改变光栅间距，研究了铝（Al）涂覆的聚二甲基硅氧烷（PDMS）光栅基板上金量子点（AuQD）的表面等离子共振（SPR）增强荧光特性。通过将入射光角度从 5° 改变到 60° 并将其从 0 拉伸到 1.0 mm 来调节 AuQDs/Al 涂层 PDMS 光栅基底的 SPR 激发波长。此外，通过拉伸基底，使用 AuQD/Al 涂层的 PDMS 光栅薄膜研究了 SPR 增强的荧光调谐能力。使用紫激光作为激发源，在 405 nm 处 p 偏振，观察 Al 光栅上 AuQD 的 SPR 增强荧光 (SPF)。 SPR 激发的波长（对应于 +1 的 SP 色散模式）在将光栅基板从 0 拉伸到 1.0 mm 时移动到更长的波长。通过拉伸AuQDs/Al光栅PDMS基底，在15°和35°固定入射角下SPR增强荧光强度增加，而在40°固定入射角下SPR增强荧光强度下降。此外，可调节 SPF 以在可调谐光学传感器中表现出不同的特性。
In this study, the surface plasmon resonance (SPR)-enhanced fluorescence properties of gold quantum dots (AuQDs) on an aluminum (Al)-coated polydimethylsiloxane (PDMS) grating substrate were investigated by changing the grating pitch via mechanical stretching. The SPR-excitation wavelength of the AuQDs/Al-coated PDMS-grating substrate was tuned by changing the incident light angle from 5° to 60° and stretching it from 0 to 1.0 mm. In addition, the SPR-enhanced fluorescence tuning ability was studied using an AuQD/Al-coated PDMS-grating film by stretching the substrate. The SPR-enhanced fluorescence (SPF) of the AuQDs on the Al-grating was observed using a violet laser as the excitation source at 405 nm with p-polarization. The wavelengths of the SPR excitation, corresponding to the SP-dispersion mode of +1, were shifted to a longer wavelength upon stretching the grating substrate from 0 to 1.0 mm. By stretching the AuQDs/Al-grating PDMS substrate, the SPR-enhanced fluorescence intensity increased at fixed incident angles of 15° and 35°, whereas the SPR-enhanced fluorescence intensity decreased at 40°. Moreover, the SPF could be tuned to exhibit different properties in tunable optical sensors.