Systematic preparation of colloidal silver nanoparticles for effective SERS substrates

Eom, So Young; Ryu, Sae Lim; Kim, Hong Lae; Kwon, Chan Ho

doi:10.1016/j.colsurfa.2013.01.036

Cited by 12 publications

(5 citation statements)

References 26 publications

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“…Preparation and characteristics of silver nanoparticles as the most effective SERS substrates have been previously described in detail. 18 Briefly, 30 mL of 2 × 10 −3 M NaBH 4 solution at ice temperature was prepared and a AgNO 3 solution (8 × 10 −3 M) at ambient temperature was added dropwise via a dispenser to the prepared NaBH 4 solution with stirring at 1500 rpm. As reduction in the solution proceeded, its color turned yellow, and afterward, the solution became turbid with precipitates.…”

Section: ■ Introductionmentioning

confidence: 99%

“…This so-called surface-enhanced Raman scattering (SERS) spectroscopy has become one of the most reliable tools for probing the structures of molecules adsorbed on metal surfaces. The SERS enhancement has generally been known to arise from local electromagnetic field enhancement by the laser around the roughened metal surface due to surface plasmon resonance and/or chemical enhancements such as charge transfer between the metal and the adsorbed molecules. , Recently, surfaces composed of two or three aggregated Ag nanoparticles, approximately 31 nm in size, have been found to be the most effective SERS substrate to investigate the adsorption behavior of molecules and the SERS mechanism . However, the shapes and sizes of various metal nanoparticles as effective SERS substrates are still under study.…”

Section: Introductionmentioning

confidence: 99%

“…16,17 Recently, surfaces composed of two or three aggregated Ag nanoparticles, approximately 31 nm in size, have been found to be the most effective SERS substrate to investigate the adsorption behavior of molecules and the SERS mechanism. 18 However, the shapes and sizes of various metal nanoparticles as effective SERS substrates are still under study. In addition, the structures and orientations of molecules adsorbed on metal surfaces can be determined from SERS spectra by applying Raman and surface selection rules.…”

Section: ■ Introductionmentioning

confidence: 99%

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Surface-Catalyzed Photodissociation of (E)-4′,4‴-(Diazene-1, 2-diyl)bis(([1,1′-biphenyl]-4-carbonitrile)) Investigated by Surface-Enhanced Raman Scattering and Quantum Chemical Calculations

et al. 2019

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Aromatic azo compounds display properties crucial for important chemical applications and have been subjected to experimental and theoretical studies based on the findings of plasmon-driven azo coupling of aminobenzene derivatives. To provide spectroscopic data for plasmon-driven azo coupling of 4′-aminobiphenyl-4-carbonitrile (4AB4CN), (E)-4′,4‴-(diazene-1,2-diyl)bis(([1,1′-biphenyl]-4-carbonitrile)) (DDBBC) was synthesized by coupling of 4AB4CN and 4′-nitroso-[1,1′-biphenyl]-4-carbonitrile in acetic acid with 40% yield. Then, the ordinary Raman and surfaceenhanced Raman scattering spectra of DDBBC were measured using a 632.8 nm excitation laser and were analyzed using quantum chemical calculations for the first time. The five characteristic peaks associated with the NN bond in the measured spectra revealed that DDBBC is adsorbed on the Ag surface via interactions between the surface and the NN and CN bonds, resulting in flat orientation on the surface. Remarkably, in an acidic solution, surface-catalyzed photodissociation of DDBBC on the surface was observed, which would partially produce 4AB4CN via interaction of the amino group with protons and chloride ions, resulting in tilted adsorption through the CN bond on the surface. Herein, it was ascertained that the surface-catalyzed photoreaction between DDBBC and 4AB4CN on Ag surfaces could be reversibly pH-controlled.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Surface-Catalyzed Photodissociation of (E)-4′,4‴-(Diazene-1, 2-diyl)bis(([1,1′-biphenyl]-4-carbonitrile)) Investigated by Surface-Enhanced Raman Scattering and Quantum Chemical Calculations

et al. 2019

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“…22 Briefly, 30 mL of 2 × 10 −3 M NaBH 4 solution at ice temperature was prepared with stirring at 1500 rpm and 8 × 10 −3 M AgNO 3 solution at ambient temperature was added drop by drop with a dispenser. As reduction in solution proceeds, its color turned yellow and afterwards the solution became turbid with precipitates.…”

Section: Methodsmentioning

confidence: 99%

Adsorption Characteristics and Structure of 4,4'-Bis(mercaptomethyl)biphenyl on Silver by Surface-enhanced Raman Scattering and Density Functional Theory Calculations

Eom¹,

Lee²,

Kim³

et al. 2014

Bulletin of the Korean Chemical Society

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Adsorption of 4,4'-bis(mercaptomethyl)biphenyl (44BMBP) on silver nanoparticles has been investigated by surface-enhanced Raman scattering (SERS) spectroscopy. In addition, the Raman spectra of 44BMBP in solid state and in basic condition have been obtained for comparative study to elicit the characteristics of adsorption. The observed Raman and SERS spectra were analyzed comparing with the normal modes and vibrational frequencies from density functional theory (DFT) calculations performed for the feasible structures of 44BMBP molecule. On the basis of excellent agreement between the calculated and the experimental results, the molecule is found to have both the cis-and trans-forms for the mercaptomethyl groups in the solid state as well as in the basic condition. In contrast, the molecule is found to be chemisorbed on the silver surface by forming two Ag-S linkages only in the cis-form but not in the trans-form due to the steric interruption, which indicates the parallel orientation of molecules on the surface. Particularly, the spectral features in the SERS spectra such as the absence of the C-H stretching band and enhancement for the out-of-plane skeletal modes are confirmatory for the parallel geometry through π interaction between the phenyl rings and the metal surface, based on the electromagnetic surface selection rule.

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“…The vivid colors of colloidal Au, Ag, and Cu metal particles are caused by their surface plasmon modes, so these are widely used as SERS substrates . Silver colloidal nanoparticles are highly active, and Ag salts are much less expensive than Au ones, which is an important consideration when designing any teaching experiment.…”

mentioning

confidence: 99%

Achieving Very Low Levels of Detection: An Improved Surface-Enhanced Raman Scattering Experiment for the Physical Chemistry Teaching Laboratory

McMillan¹

2016

J. Chem. Educ.

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This experiment was designed and successfully introduced to complement the nanochemistry taught to undergraduate students in a useful and interesting way. Colloidal Ag nanoparticles were synthesized by a simple, room-temperature method and the resulting suspension was then used to study the Surface-Enhanced Raman Scattering (SERS) of methylene blue. The colloid was also characterized by UV-Visible spectroscopy and these results were used to help explain some of the observed SERS features. The students looked at the effects of concentration and acquisition time on the measured SERS spectra, and the final part of the experiment was based around using their newly-acquired knowledge to investigate the lowest concentration of methylene blue that could be detected. Concentrations of 5×10-10 M were routinely achieved. The combination of UV-Visible spectroscopy, SERS and nanochemistry made for an interesting and thought-provoking laboratory experience.

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Systematic preparation of colloidal silver nanoparticles for effective SERS substrates

Cited by 12 publications

References 26 publications

Surface-Catalyzed Photodissociation of (E)-4′,4‴-(Diazene-1, 2-diyl)bis(([1,1′-biphenyl]-4-carbonitrile)) Investigated by Surface-Enhanced Raman Scattering and Quantum Chemical Calculations

Surface-Catalyzed Photodissociation of (E)-4′,4‴-(Diazene-1, 2-diyl)bis(([1,1′-biphenyl]-4-carbonitrile)) Investigated by Surface-Enhanced Raman Scattering and Quantum Chemical Calculations

Adsorption Characteristics and Structure of 4,4'-Bis(mercaptomethyl)biphenyl on Silver by Surface-enhanced Raman Scattering and Density Functional Theory Calculations

Achieving Very Low Levels of Detection: An Improved Surface-Enhanced Raman Scattering Experiment for the Physical Chemistry Teaching Laboratory

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