High-yield colloidal synthesis of monometallic Au nanorod–Au nanoparticle dimers and their application in SERS

Chen, Suli; Chen, Lei; Hu, Huicheng; Liu, Qipeng; Xu, Yong; Ji, Fei; Bao, Feng; Fan, Jian; Zhang, Qiao

doi:10.1039/c7ra01039g

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…Each molecule has a unique Raman spectrum, which allows Raman spectroscopy–based techniques to be widely applied in food safety control, environmental protection, interface science, nanoscience, chemical analysis, and other fields . However, to fully utilize the potential of SERS, the corresponding substrates should be easy to prepare, store, and use and should exhibit high sensitivity and stability . At present, the most commonly used SERS substrates correspond to active metal sols, active metal electrodes and metal films, core‐shell materials, etc .…”

Section: Introductionmentioning

confidence: 99%

Cationic surfactant regulated synthesis of Au nanorods for sensitive detection of negatively charged colorants by surface‐enhanced Raman spectroscopy

Miao¹,

Zhou³

et al. 2019

J Raman Spectroscopy

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Although surface-enhanced Raman spectroscopy (SERS) has recently emerged as a powerful analytical tool, its widespread use is hindered by several inherent problems (e.g., low reproducibility) that need to be solved before further progress is possible. Herein, we used dodecyltrimethylammonium bromide (DTAB), N-dodecyl-N-2-hydroxyethyl-N,N-dimethylammonium bromide (C 12 HDAB), and N-dodecyl-N,N-2-dihydroxyethyl-N-methylammonium bromide (C 12 DHAB) as templates for the seed-mediated growth of Au nanorods with different aspect ratios and probed the growth mechanism by a range of instrumental techniques. The prepared nanorods were used as substrates for SERS-based detection of three negatively charged colorants (lemon yellow, orange II, and amaranth) and exhibited extraordinary SERS sensitivity for all of these targets. The highest sensitivity was observed in the case of C 12 DHAB-capped nanorods, which was attributed to abundant hydrogen bonds between surfactants and targets and strong electrostatic adsorption of negatively charged colorants. Therefore, the above substrate was concluded to be well suited for real-life applications.

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Section: Introductionmentioning

confidence: 99%

Cationic surfactant regulated synthesis of Au nanorods for sensitive detection of negatively charged colorants by surface‐enhanced Raman spectroscopy

Miao¹,

Zhou³

et al. 2019

J Raman Spectroscopy

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“…To meet different experimental requirements, metal nanoparticles can also be prepared using various capping agents such as citrate,[27] polyvinylpyrrolidone (PVP),[28] or cetyl trimethylammonium bromide (CTAB). [29]…”

Section: Introductionmentioning

confidence: 99%

A rapid and simple chemical method for the preparation of Ag colloids for surface-enhanced Raman spectroscopy using the Ag mirror reaction

Panneerselvam

Xiao

Waites

et al. 2018

Vibrational Spectroscopy

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Colloidal silver (Ag) nanoparticles (AgNP) have been widely used for surface-enhanced Raman spectroscopy (SERS) applications. We report a simple, rapid and effective method to prepare AgNP colloids for SERS using the classic organic chemistry Ag mirror reaction with Tollens’ reagent. The AgNP colloid prepared with this process was characterized using SEM, and the reaction conditions further optimized using SERS measurements. It was found that Ag mirror reaction conditions that included 20 mM AgNO3, 5 min reaction time, and 0.5 M glucose produced AgNP colloids with an average size of 319.1 nm (s.d ±128.1). These AgNP colloids exhibited a significant SERS response when adenine was used as the reporter molecule. The usefulness of these new AgNP colloids was demonstrated by detecting the nucleotides adenosine 5′-monophosphate (AMP), guanosine 5′-monophosphate (GMP), cytidine 5′-monophosphate (CMP), and uridine 5′-monophosphate (UMP). A detection limit of 500 nM for AMP was achieved with the as-prepared AgNP colloid. The bacterium Mycoplasma pneumoniae was also easily detected in laboratory culture with these SERS substrates. These findings attest to the applicability of this AgNP colloid for the sensitive and specific detection of both small biomolecules and microorganisms.

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Optimized Au NRs for efficient SERS and SERRS performances with molecular and longitudinal surface plasmon resonance

Sahu

Dwivedi

Pal

et al. 2021

Applied Surface Science

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High-yield colloidal synthesis of monometallic Au nanorod–Au nanoparticle dimers and their application in SERS

Abstract: Dimeric nanostructures have attracted much attention owing to their unique structure and excellent physiochemical properties.

Cited by 7 publications

References 44 publications

Cationic surfactant regulated synthesis of Au nanorods for sensitive detection of negatively charged colorants by surface‐enhanced Raman spectroscopy

Cationic surfactant regulated synthesis of Au nanorods for sensitive detection of negatively charged colorants by surface‐enhanced Raman spectroscopy

A rapid and simple chemical method for the preparation of Ag colloids for surface-enhanced Raman spectroscopy using the Ag mirror reaction

Optimized Au NRs for efficient SERS and SERRS performances with molecular and longitudinal surface plasmon resonance

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