Direct synthesis of monolayer gold nanoparticles on epoxy based photoresist by photoreduction and application to surface-enhanced Raman sensing

Chen, Yi Jui; Chang, Wen Huei; Chiu, Yi-Chun; Huang, Chih Chia; Lin, Chun Hung

doi:10.1016/j.matdes.2020.109211

Cited by 12 publications

(22 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A remarkably small intensity variation highlights a reproducibility of ~95%, which could be the lowest among the previously reported substrates fabricated by various techniques. [13][14][15][16][17][18] These findings are promising, especially This latter matches the plasmonic band (545 nm) of GNC and results in higher SERS intensity. Basically, the excitation energy plays a crucial role in SERS enhancement and must be the closer to the surface plasmon resonance peak [26].…”

Section: Sers Enhancement As a Function Of Gnp Shapementioning

confidence: 68%

“…Such aspects about the effect of morphology on the sensing properties were widely investigated by other groups. Nevertheless, most studies did not allow a good understanding about the impact of morphology on sensitivity because colloidal NPs are usually used in detection due to their ultrasensitivity [ 13 , 14 , 44 ]. However, a good control of such systems in terms of size, surface roughness, interparticle distances, and shape is generally difficult [ 26 , 45 , 46 ].…”

Section: Resultsmentioning

confidence: 99%

“…A remarkably small intensity variation highlights a reproducibility of ~95%, which could be the lowest among the previously reported substrates fabricated by various techniques. [ 13 , 14 , 15 , 16 , 17 , 18 ] These findings are promising, especially for sensing since it is always challenging to have a SERS substrate with adequate signal enhancement and lower intensity variation.…”

Section: Resultsmentioning

confidence: 99%

“…However, different physical, chemical, and biological methods have synthesized MNPs (Au, Pt, Cu, Al, etc.) of different shapes [ 13 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Advanced Large-Scale Nanofabrication Route for Ultrasensitive SERS Platforms Based on Precisely Shaped Gold Nanostructures

Akil¹,

Omar²,

Кузнецов

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

One of the key issues for SERS-based trace applications is engineering structurally uniform substrates with ultrasensitivity, stability, and good reproducibility. A label-free, cost-effective, and reproducible fabrication strategy of ultrasensitive SERS sensors was reported in this work. Herein, we present recent progress in self-assembly-based synthesis to elaborate precisely shaped and abundant gold nanoparticles in a large area. We demonstrated that shape control is driven by the selective adsorption of a cation (Na+, K+, and H+) on a single facet of gold nanocrystal seeds during the growth process. We studied SERS features as a function of morphology. Importantly, we found a correlation between the shape and experimental SERS enhancement factors. We observed a detection threshold of 10−20 M of bipyridine ethylene (BPE), which matches the lowest value determined in literature for BPE until now. Such novel sensing finding could be very promising for diseases and pathogen detection and opens up an avenue toward predicting which other morphologies could offer improved sensitivity.

show abstract

Section: Sers Enhancement As a Function Of Gnp Shapementioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

“…A remarkably small intensity variation highlights a reproducibility of ~95%, which could be the lowest among the previously reported substrates fabricated by various techniques. [ 13 , 14 , 15 , 16 , 17 , 18 ] These findings are promising, especially for sensing since it is always challenging to have a SERS substrate with adequate signal enhancement and lower intensity variation.…”

Section: Resultsmentioning

confidence: 99%

“…However, different physical, chemical, and biological methods have synthesized MNPs (Au, Pt, Cu, Al, etc.) of different shapes [ 13 , 14 , 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Advanced Large-Scale Nanofabrication Route for Ultrasensitive SERS Platforms Based on Precisely Shaped Gold Nanostructures

Akil¹,

Omar²,

Кузнецов

et al. 2021

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…18,24−26 Therefore, the yields are metal/polymer composites but not pure metallic nanostructures. In our previous study, 27 In this study, we aim to exploit the unique role of SU-8 in the photoreduction process. AuNPs can be synthesized by selectively exposing a predefined area on the SU-8 surface to gold precursors.…”

Section: Introductionmentioning

confidence: 99%

Selective Growth of Patterned Monolayer Gold Nanoparticles on SU-8 through Photoreduction for Plasmonic Applications

Chen

Chang

Lin

2020

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

This paper presents a simple approach for the selective growth of patterned monolayer gold nanoparticles (AuNPs) and bulk gold nanostructures through photoreduction. Photoreduction can occur on the surface of SU-8 but not on the surface of poly(methyl methacrylate) (PMMA). Therefore, a PMMA mask was introduced to the SU-8 surface to confine the area for AuNP production. We developed a residual layer-free nanotransfer printing process to transfer the PMMA mask from a perfluoropolyether mold onto the SU-8 surface. After the exposure of a drop of HAuCl 4 over the SU-8 surface masked by PMMA to UV light, AuNPs formed on the uncovered SU-8 surface. Gold nanostructures with various shapes, including nanodisks, nanorings, nanorod dimers, and asymmetric U-shaped split-ring resonators, were produced through the proposed approach. The optical properties of the fabricated nanostructures were investigated and found to be consistent with the simulation. Overall, this study provides a reliable and predictable process for fabricating gold nanostructures with various shapes, which can be beneficial for plasmonic applications.

show abstract

Histidine-capped fluorescent copper nanoclusters: an efficient sensor for determination of furaltadone in aqueous solution

et al. 2022

View full text Add to dashboard Cite

Direct synthesis of monolayer gold nanoparticles on epoxy based photoresist by photoreduction and application to surface-enhanced Raman sensing

Cited by 12 publications

References 45 publications

Advanced Large-Scale Nanofabrication Route for Ultrasensitive SERS Platforms Based on Precisely Shaped Gold Nanostructures

Advanced Large-Scale Nanofabrication Route for Ultrasensitive SERS Platforms Based on Precisely Shaped Gold Nanostructures

Selective Growth of Patterned Monolayer Gold Nanoparticles on SU-8 through Photoreduction for Plasmonic Applications

Histidine-capped fluorescent copper nanoclusters: an efficient sensor for determination of furaltadone in aqueous solution

Contact Info

Product

Resources

About