Partially embedded gold nanoislands in a glass substrate for SERS applications

Yaseen, Mohammad Tariq; Chen, Minfeng; Chang, Yia-Chung

doi:10.1039/c4ra08419e

Cited by 11 publications

(7 citation statements)

References 27 publications

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“…4d. These results are in good agreement with those on embedding of evaporated gold nano-islands into the softened glass substrates 29,30 while the melting point of PDMS is −40 °C and the glass transition temperature is very low (−125 °C), cured PDMS has a softening point around 50 °C-60 °C. That means that Ag nano-islands could be embedded into PDMS and migrate deeper and deeper as the annealing temperature increases.…”

Section: Resultssupporting

confidence: 88%

“…27 ELISA provides the information of antibody in a relative form that is based on a combination of affinity and concentration. Liquid Chromatography-Mass Spectrometry (LC-MS), combined with electrospray ionization is a recently developed method 28,29 which can distinguish the natural and recombinant forms of somatotropin. However, it is a complex method, requiring expensive instruments.…”

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confidence: 99%

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Thermally-Driven Micro-Walled Nano-Composite Microfluidic Platform for Controlled Localized Surface Plasmonic Detection of Bovine Growth Hormones

2022

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A novel method of integration of a silver-polydimethylsiloxane (PDMS) nanocomposite in a microfluidic channel for the realization of a lab-on-a-chip is reported in this work. By using a silver nitrate aqueous precursor solution, silver nanostructures are formed on the surface of PDMS, by in-situ reduction. The silver aggregates formed by reduction have a wide absorbance band in the UV-Visible range. Separated silver nano-islands, having narrow absorbance bands are formed by using the post-reduction annealing process. The plasmonic property of the silver nanostructures is used for the detection of bovine growth hormone. Subsequently, the nanocomposite was integrated into a microfluidic channel and the detection experiments were carried out in a microfluidic environment as well. The experiments confirmed that the nanocomposite can be integrated into the microfluidic device in order to enhance the detection sensitivity.

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Section: Resultssupporting

confidence: 88%

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confidence: 99%

Thermally-Driven Micro-Walled Nano-Composite Microfluidic Platform for Controlled Localized Surface Plasmonic Detection of Bovine Growth Hormones

2022

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“…The Au thin film is physisorbed on the surface with a weak adhesion. By applying the annealing procedure, the Au nanoparticles are first formed on the surface and then these nanoparticles are gradually embedded in the glass of FTO because the annealing temperature is near the transition temperature of glass 34,35 . Such embedded Au nanoparticles in the glass are highly stable and act as seeding nanoparticles for the growth of AuNSs 34,36,37 .…”

Section: Resultsmentioning

confidence: 99%

Seed-mediated Electrochemically Developed Au Nanostructures with Boosted Sensing Properties: An Implication for Non-enzymatic Glucose Detection

Siampour

Abbasian

Moshaii

et al. 2020

Sci Rep

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A new approach has been developed to improve sensing performances of electrochemically grown Au nanostructures (AuNSs) based on the pre-seeding of the electrode. The pre-seeding modification is simply carried out by vacuum thermal deposition of 5 nm thin film of Au on the substrate followed by thermal annealing at 500 °C. The electrochemical growth of AuNSs on the pre-seeded substrates leads to impressive electrochemical responses of the electrode owing to the seeding modification. The dependence of the morphology and the electrochemical properties of the AunSs on various deposition potentials and times have been investigated. for the positive potentials, the pre-seeding leads to the growth of porous and hole-possess networks of AunSs on the surface. for the negative potentials, AunSs with carved stone ball shapes are produced. the superior electrode was achieved from AunSs developed at 0.1 V for 900 s with pre-seeding modification. The sensing properties of the superior electrode toward glucose detection show a high sensitivity of 184.9 µA mM −1 cm −2 , with a remarkable detection limit of 0.32 µM and a wide range of linearity. the excellent selectivity and reproducibility of the sensors propose the current approach as a large-scale production route for non-enzymatic glucose detection. During past decades, electrochemical sensing has attracted many attentions due to their considerable advantages such as high sensitivity, low cost, fast response time, wide linear range and portability and widespread applications 1-9. Up to now various types of nanomaterial such as carbon nanotubes 10 , graphene 11,12 , noble metals 13,14 , metal oxides 15 , hybrid 16 and composite nanostructures 17,18 have been developed for electrochemical sensing. Among different nanomaterials, gold nanostructures (AuNSs) have attracted significant interests because of their remarkable electrical and catalytic properties, easy functionalization and excellent biocompatibility. Since the electron transfer and catalytic activity of AuNSs strongly depend on their morphology and their size, extensive researches have been proposed in literatures to develop optimized AuNSs for sensing applications 19,20. The notable approaches between them are based on the electrodeposition 19 , direct electrostatic self-assembly 21 , self-assembly with polymer 22-24 and seed-mediated growth 25-28. In the cases of self-assembly and seed-mediated strategies, the electron transfer and catalytic activity of AuNSs are hindered due to the existence of surfactant and linker molecules surrounding the nanostructures. The electrodeposition is the most reliable approach for shape and size controlled construction of AuNSs due to the possibility of controlling the nucleation and the growth processes. However, in this method the well control of morphology is provided by using template, surfactant or pre-treatment of the substrate that limit the applicability of the method 20,29,30 .

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“…AuNPs are formed in the thermal annealing process due to solid state dewetting for the minimisation of surface energy. Since the prepared gold nanostructures are clean, they were widely used in developing localised surface plasmon resonance (LSPR) [20][21][22] and SERS sensors [23,24].…”

Section: Introductionmentioning

confidence: 99%

Deposition of gold nanoparticles upon bare and indium tin oxide film coated glass based on annealing process

Feng

Ding

Chen

et al. 2019

Journal of Experimental Nanoscience

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Partially embedded gold nanoislands in a glass substrate for SERS applications

Abstract: We investigate the surface enhanced Raman scattering (SERS) of biomolecules attached to partially embedded gold nanoislands in a transparent substrate.

Cited by 11 publications

References 27 publications

Thermally-Driven Micro-Walled Nano-Composite Microfluidic Platform for Controlled Localized Surface Plasmonic Detection of Bovine Growth Hormones

Thermally-Driven Micro-Walled Nano-Composite Microfluidic Platform for Controlled Localized Surface Plasmonic Detection of Bovine Growth Hormones

Seed-mediated Electrochemically Developed Au Nanostructures with Boosted Sensing Properties: An Implication for Non-enzymatic Glucose Detection

Deposition of gold nanoparticles upon bare and indium tin oxide film coated glass based on annealing process

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