Lotus leaf mastoid inspired Ag micro/nanoarrays on PDMS film as flexible SERS sensor for in-situ analysis of pesticide residues on nonplanar surfaces

Zhu, Zhengdong; Shi, Xiaoyi; Feng, Yating; He, Meng; Cheng, Ya; Zhou, Hongyang; Zhang, Maofeng; Zhang, Wei; Li, Jianhua; Jiang, Changlong

doi:10.1016/j.saa.2022.122211

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…15 shows top-down photolithographic substrates that use different SERS platforms, such as plasmonic nanorods, nanocone, and nanoarray hybrid structures that have been introduced for signal enhancement. 198–230 3D bottom-up self-assembly nanostructures are described owing to facile preparation and cost-effectiveness. 231–251 Combinatory detection is used for synergetic enhancements.…”

Section: Development Of Microdevices For Point-of-care Sers-based Bio...mentioning

confidence: 99%

SERS-based microdevices for use as in vitro diagnostic biosensors

Lee,

Dang,

Moon

et al. 2024

Chem. Soc. Rev.

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Section: Development Of Microdevices For Point-of-care Sers-based Bio...mentioning

confidence: 99%

SERS-based microdevices for use as in vitro diagnostic biosensors

Lee,

Dang,

Moon

et al. 2024

Chem. Soc. Rev.

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“…To detect MG on the fish surface, a strategy similar to previous literature [19] was adopted, i.e. the fish surface was sprayed with an aqueous solution of 0.1 to 100 ppm MG and allowed to dry naturally in the air.…”

Section: Measurement and Characterizationmentioning

confidence: 99%

“…Among them, the template method can costefficiently prepare 3D SERS substrates in a large area. In addition to the commonly used man-made templates such as anodized aluminum [15] and porous silicon [16], many researchers have used unique micro-nano structures in nature to prepare SERS substrates in a biomimetic way [17], such as diatom particles [18], lotus leaf surfaces [19], insect wings [20], etc. Natural nanostructures, especially those regular ones such as cicada wings, are economical and desirable SERS support materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and investigation of high-performance flexible and transparent Ag/PDMS substrate with the bionic structure of cicada wings

He,

Wang,

Luo

et al. 2024

Laser Phys.

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In this study, an efficient, homogeneous, flexible and transparent Ag/Polydimethylsiloxane (PDMS) substrate with an orderly three-dimensional nanopillar structure was proposed. Ag NPs were thermally deposited on the flexible bionic PDMS support obtained by a two-step replication of cicada wings. Scanning electron microscope images reveal when the deposition time was 50 min, Ag NPs of proper size densely covered the entire PDMS nanopillar surface in the Ag-50/PDMS substrate. Both the gaps between the Ag NPs and those between the nanopillars acted as efficient electric field amplifiers. The enhancement factor (EF) of the Ag-50/PDMS substrate was calculated to be 2.89 × 107 by using crystal violet as the probe molecule. The Ag-50/PDMS substrate also exhibited good uniformity and reproducibility with a relative standard deviation of 1.46% and 11.45% respectively. The detection capability of the proposed flexible and transparent Ag-50/PDMS substrate in practical applications was demonstrated by the in-situ detection of 0.1 ppm malachite green on fish surfaces, indicating its great potential in the field of food monitoring.

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“…This approach increases the number of hot spots and capture sites while conforming more closely to complex surfaces [ 26 ]. However, current methods for creating these structures, such as molding and oxygen plasma treatment, are not suitable for the high-throughput production of SERS substrates in a simple and cost-effective manner [ 27 , 28 , 29 , 30 , 31 , 32 , 33 ]. Therefore, there is an urgent demand for a simple, efficient, and affordable technology that can create structured 3D features on large-scale PDMS films.…”

Section: Introductionmentioning

confidence: 99%

Curvature-Insensitive Transparent Surface-Enhanced Raman Scattering Substrate Based on Large-Area Ag Nanoparticle-Coated Wrinkled Polystyrene/Polydimethylsiloxane Film for Reliable In Situ Detection

Sun,

Huang,

Wang

et al. 2024

Molecules

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Flexible and transparent surface-enhanced Raman scattering (SERS) substrates have attracted considerable attention for their ability to enable the direct in situ detection of analytes on curved surfaces. However, the curvature of an object can impact the signal enhancement of SERS during the measurement process. Herein, we propose a simple approach for fabricating a curvature-insensitive transparent SERS substrate by depositing silver nanoparticles (Ag NPs) onto a large-area wrinkled polystyrene/polydimethylsiloxane (Ag NP@W-PS/PDMS) bilayer film. Using rhodamine 6G (R6G) as a probe molecule, the optimized Ag NP@W-PS/PDMS film demonstrates a high analytical enhancement factor (AEF) of 4.83 × 105, excellent uniformity (RSD = 7.85%) and reproducibility (RSD = 3.09%), as well as superior mechanical flexibility. Additionally, in situ measurements of malachite green (MG) on objects with diverse curvatures, including fish, apple, and blueberry, are conducted using a portable Raman system, revealing a consistent SERS enhancement. Furthermore, a robust linear relationship (R2 ≥ 0.990) between Raman intensity and the logarithmic concentration of MG detected from these objects is achieved. These results demonstrate the tremendous potential of the developed curvature-insensitive SERS substrate as a point-of-care testing (POCT) platform for identifying analytes on irregular objects.

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Lotus leaf mastoid inspired Ag micro/nanoarrays on PDMS film as flexible SERS sensor for in-situ analysis of pesticide residues on nonplanar surfaces

Cited by 16 publications

References 29 publications

SERS-based microdevices for use as in vitro diagnostic biosensors

SERS-based microdevices for use as in vitro diagnostic biosensors

Preparation and investigation of high-performance flexible and transparent Ag/PDMS substrate with the bionic structure of cicada wings

Curvature-Insensitive Transparent Surface-Enhanced Raman Scattering Substrate Based on Large-Area Ag Nanoparticle-Coated Wrinkled Polystyrene/Polydimethylsiloxane Film for Reliable In Situ Detection

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