Highly reproducible, stable and multiply regenerated surface-enhanced Raman scattering substrate for biomedical applications

Kamińska, Agnieszka; Dzięcielewski, Igor; Weyher, J.L.; Waluk, Jacek; Gawinkowski, Sylwester; Sashuk, Volodymyr; Fiałkowski, Marcin; Sawicka, Marta; Suski, T.; Porowski, S.; Hołyst, Robert

doi:10.1039/c0jm03336g

Cited by 68 publications

(45 citation statements)

References 50 publications

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“…These spectra are relatively very strong and well characterized. Also, they are well agreed with reported ones . Therefore, we believe that our method can be used to measure SERS spectra of most molecules.…”

Section: Resultssupporting

confidence: 90%

Simple and efficient fabrication of dimers of silver colloidal particles for surface‐enhanced Raman scattering

Yoon

Suh

2018

J Raman Spectroscopy

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We developed a simple and efficient method to fabricate surface‐enhanced Raman scattering (SERS) substrates consisting mainly of dimers of Ag colloidal particles. The SERS substrates were fabricated by immobilization of Ag colloidal particles on a cover glass coated with poly(4‐vinyl pyridine), and then adsorption of target molecules on the immobilized colloidal particles, and then second immobilization. To increase the surface charge of the colloidal particles, pristine silver sols were purified by centrifuging. Also, the colloidal particle diameter was optimized to achieve a high Raman signal enhancement from their dimers. When silver sols purified were used in the immobilizations, the dimers of Ag colloidal particles were formed dominantly with very few trimers and tetramers. The percentage of dimerization among Ag colloidal particles immobilized by the first immobilization was about 65%, 73%, and 77% when the second immobilization time was 10, 20, and 30 min, respectively. With an increase in the second immobilization duration, the peak intensity of the longitudinal mode of the dimers increased without any shift in its extinction peak wavelength (λmax) from 519 nm. By excitation with a 514.5 nm laser line, the highest enhancement was obtained when dimers were formed from the Ag colloidal particles whose average diameter was 28 nm. The fabricated substrates were very sensitive and stable. Also, they showed very good SERS spectra, with an average enhancement factor of ~6.2 × 107. The enhancement factor at the junction was estimated roughly to be 1.3 × 109. Our method could be used to measure SERS spectra of most molecules.

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Section: Resultssupporting

confidence: 90%

Simple and efficient fabrication of dimers of silver colloidal particles for surface‐enhanced Raman scattering

Yoon

Suh

2018

J Raman Spectroscopy

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“…4.10a, the Raman signals were measured at 30 randomly chosen spots from 10 Au scales. The RSD is 5.2 %, comparable to [30,45] or even better than [41,46,47] those reported in very recent studies. This result indicates that Au butterfly wing scales with geneengineered structures have excellent reproducibility in Raman signal enhancement and can be applied in laboratories and industries.…”

Section: Sers Properties Of Au Butterfly Wing Scales With Ordered Strsupporting

confidence: 85%

“…In comparison, "bottom-up" constructions have been developed to efficiently generate 3D structures ( Fig. 1.3; [43][44][45]. Organic NPs can first self-assemble into specific 3D structures via some weak and noncovalent forces.…”

Section: Plasmonic Structuresmentioning

confidence: 99%

Metallic Butterfly Wing Scales

Gu¹,

Zhang²,

Tan³

2015

SpringerBriefs in Materials

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The SpringerBriefs Series in Materials presents highly relevant, concise monographs on a wide range of topics covering fundamental advances and new applications in the field. Areas of interest include topical information on innovative, structural and functional materials and composites as well as fundamental principles, physical properties, materials theory and design. SpringerBriefs present succinct summaries of cutting-edge research and practical applications across a wide spectrum of fields. Featuring compact volumes of 50 to 125 pages, the series covers a range of content from professional to academic. Typical topics might include:• A timely report of state-of-the art analytical techniques

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“…For obtaining nano-size etch pits ( Fig. 2(b)), the two steps etching is used, namely short electroless photo-etching with the aim of transforming stable surface oxide Ga 2 O 3 into hydroxide (gallate) Ga(OH) 3 , which is soluble in subsequently used hot 1 M KOH water solution. 21,23 The latter etching step leads to the formation of nano-size pits at the dislocation outcrops.…”

mentioning

confidence: 99%

On the hydrophobicity of modified Ga-polar GaN surfaces

Dzięcielewski

Weyher

Dzwolak

2013

Applied Physics Letters

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In this communication, we show that chemical modifications of etched GaN (with different morphological features) through treatment with trichlorododecylsilane or sputtering nano-Au films followed by covalent binding of 1-dodecanethiol strongly affect surface water repellency characteristics. Binding of 1-dodecanethiol to Au-coated whiskers results in GaN crystals becoming superhydrophobic with the contact angles approaching 150°. For a single type of surface morphology, a pairwise comparison of contact angle values of trichlorododecylsilane- and Au/1-dodecanethiol-modified surfaces provides an insight into relative abundance of –OH groups on GaN's Ga-polar side, which mediate and control binding of the hydrophobic silane compound, but not of thiols.

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Highly reproducible, stable and multiply regenerated surface-enhanced Raman scattering substrate for biomedical applications

Cited by 68 publications

References 50 publications

Simple and efficient fabrication of dimers of silver colloidal particles for surface‐enhanced Raman scattering

Simple and efficient fabrication of dimers of silver colloidal particles for surface‐enhanced Raman scattering

Metallic Butterfly Wing Scales

On the hydrophobicity of modified Ga-polar GaN surfaces

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