Electrostatic self-assembly of 2D Janus PS@Au nanoraspberry photonic-crystal array with enhanced near-infrared SERS activity

Cao, Ang; Zhang, Tao; Liu, Dilong; Xing, Changchang; Zhong, Shichuan; Li, Xuejiao; Zhang, Pan; Li, Yue

doi:10.1039/d1ma01033f

Cited by 6 publications

(5 citation statements)

References 51 publications

(70 reference statements)

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“…Surface-enhanced Raman spectroscopy (SERS) is a powerful molecular fingerprinting technique with wide-ranging applications in fields like biology, , chemistry, , and medical treatment. , Its benefits include low cost, high sensitivity, strong resistance to interference, and nondestructive detection capabilities. − However, most SERS substrates are constructed on inflexible materials, which offer the advantage of high enhancement effects and controlled preparation. − Nevertheless, this characteristic poses challenges in certain specific applications, particularly in the in situ detection of pesticide residues in food items (e.g., fruits and vegetables.) with curved surfaces. , The use of inflexible SERS substrates may result in issues related to the loss of extracts and contamination of samples during storage and transportation.…”

Section: Introductionmentioning

confidence: 99%

Flexible Large-Area Surface Enhanced Raman Scattering Substrate Based on Bowl-Shaped Arrays of Au Nanoparticles on PDMS

Mi,

Yuan,

Hao

et al. 2024

ACS Appl. Nano Mater.

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Surface enhanced Raman scattering (SERS) is a technique that utilizes the surface electric field of metal nanostructures to amplify Raman signals and promote the analysis and detection of trace molecules. In order to harness the potential of flexible SERS substrates, this work proposes a simple and cost-effective method for preparing a large-area (circular, 7.5 cm in diameter, with a 38 cm 2 area) three-dimensional (3D) flexible SERS substrate. We first prepared a bowl-shaped nanoarray of polydimethylsiloxane (PDMS) by utilizing a polystyrene microsphere (PS) as sacrificial templates and then loaded a monolayer of gold nanoparticles (AuNPs) on it, finally a high-strength 3D AuNPs/PDMS flexible SERS substrate is obtained successfully. There are two key steps here, which are using plasma etching to regulate the gap between PS spheres and using the thermal demolding method to facilitate the separation of PS and PDMS. The ultralarge area AuNPs/PDMS substrate exhibits high SERS detection sensitivity and good uniformity. The SERS substrate possesses the advantage of multifunctional detection. The proposed substrate demonstrated detections of up to 10 −9 , 10 −7 , and 10 −8 M concentrations of rhodamine 6G (R6G), vitamin C, and thiram molecules, respectively. The detection results meet international standards. Electromagnetic simulations using the finite difference time domain reveal that the SERS enhancement originates from the surface plasmon resonance and coupling effects of AuNPs. This large-area 3D flexible SERS substrate not only enhances detection efficiency by enabling the detection of a greater number of samples or sample regions but also provides a new approach for detecting vitamin C and pesticide residues. It may also be used in electronic skin sensors, in situ pesticide residue detection, on-scene evidence collection in criminal investigations, and so on.

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Section: Introductionmentioning

confidence: 99%

Flexible Large-Area Surface Enhanced Raman Scattering Substrate Based on Bowl-Shaped Arrays of Au Nanoparticles on PDMS

Mi,

Yuan,

Hao

et al. 2024

ACS Appl. Nano Mater.

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“…[11][12][13][14][15] Plasmonic noble metal nanoparticles (NPs), such as Au and Ag, have attracted tremendous attention due to their strong size-and shape-dependent LSPR. [16][17][18][19][20] This unique property enables them to be excellent SERS substrates to realize the noninvasive and trace detection of target molecules without adding labels. [21][22][23] For biochemical application, visible light may cause damage to biomolecules, making accurate detection impossible.…”

Section: Introductionmentioning

confidence: 99%

High-throughput surface-enhanced Raman scattering sensors for near-infrared detection of biochemical molecules

et al. 2023

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“…A nearinfrared (NIR) laser has a strong penetration ability in water and is less destructive to biomolecules, making it highly suitable for biosensing. [9][10][11][12][13][14] To overcome these limitations, NIR light has thus emerged as an alternative light source for SERS detection.…”

Section: Introductionmentioning

confidence: 99%

A high-density Ag nanoneedle forest array by using a nano-peeling technique for near-infrared SERS detection

Chen,

Zeng,

Wang

et al. 2023

J. Mater. Chem. C

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Electrostatic self-assembly of 2D Janus PS@Au nanoraspberry photonic-crystal array with enhanced near-infrared SERS activity

Abstract: We develop a simple electrostatic self-assembly strategy to fabricate a kind of 2D Janus PS@Au nanoraspberry photonic-crystal array with a compelling near-infrared (NIR) SERS performance. Due to the opposite charges,...

Cited by 6 publications

References 51 publications

Flexible Large-Area Surface Enhanced Raman Scattering Substrate Based on Bowl-Shaped Arrays of Au Nanoparticles on PDMS

Flexible Large-Area Surface Enhanced Raman Scattering Substrate Based on Bowl-Shaped Arrays of Au Nanoparticles on PDMS

High-throughput surface-enhanced Raman scattering sensors for near-infrared detection of biochemical molecules

A high-density Ag nanoneedle forest array by using a nano-peeling technique for near-infrared SERS detection

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