Few molecule SERS detection using nanolens based plasmonic nanostructure: application to point mutation detection

Das, Gobind; Alrasheed, Salma; Coluccio, Maria Laura; Gentile, Francesco; Nicastri, Annalisa; Candeloro, Patrizio; Cuda, Giovanni; Perozziello, Gerardo; Fabrizio, E. Di

doi:10.1039/c6ra23301e

Cited by 7 publications

(8 citation statements)

References 44 publications

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“…The measured Raman peaks of the R6G molecules are mainly located at 1181 cm −1 , 1314 cm −1 , 1365 cm −1 , 1514 cm −1 and 1661 cm −1 . The R6G Raman peak at 1181 cm −1 and 1365 cm −1 are attributed to C-H x in-plane bending and the COO- vibration 33 . Those at 1514 cm −1 , and 1661 cm −1 are related the C-C ring stretching vibration 33 .…”

Section: Resultsmentioning

confidence: 99%

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Nanotip-assisted photoreduction of silver nanostructures on chemically patterned ferroelectric crystals for surface enhanced Raman scattering

Wang

Chang

Chen

et al. 2019

Sci Rep

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Nanotips made of metal and semiconductor have been widely utilized in versatile applications to strengthen the electric field through lightning rod effect and localized surface plasmon resonance (LSPR) effect. Here, we present the utilization of ferroelectric nanotips to assist photoreduction of silver nanostructures for surface enhanced Raman scattering (SERS). Ferroelectric nanotips with spontaneous polarization posses the unique feature of producing the permanent electrostatic field without requiring external excitation, which differs from the present nanotips requiring electrical and optical excitation. The enhanced electrostatic field promotes the formation of silver nanoparticles by reducing the effect of Stern layer and accelerating the movement of photoelectrons and silver ions to the template surface. Experimental results show that sharp ferroelectric nanotips facilitate the formation of large-diameter nanoparticles with strong LSPR action. Compared to the conventional ferroelectric templates, the SERS substrates using nanotip-equipped ferroelectric templates produce 5.51 times larger Raman intensity, which can be further increased by >10.76 times by increasing the reaction time. The proposed SERS substrate owns the limit of detection <10 −8 M and the enhancement factor of 2.3 × 10 9 . The presented ferroelectric nanotips with permanent electrostatic field would open promising applications in the versatile areas, such as nanomaterial fabrication and optoelectronic devices.

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Section: Resultsmentioning

confidence: 99%

“…The R6G Raman peak at 1181 cm −1 and 1365 cm −1 are attributed to C-H x in-plane bending and the COO- vibration 33 . Those at 1514 cm −1 , and 1661 cm −1 are related the C-C ring stretching vibration 33 . The Raman peak of LiNbO 3 is only observed at 866 cm −1 , which can be easily separated from the Raman peaks of R6G molecules.…”

Section: Resultsmentioning

confidence: 99%

Nanotip-assisted photoreduction of silver nanostructures on chemically patterned ferroelectric crystals for surface enhanced Raman scattering

Wang

Chang

Chen

et al. 2019

Sci Rep

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“…Further work on this field has been performed by Das et al., which extended the initial results of ref. [] to several organic molecules, including Rhodamine 6G and Benzenethiol . They showed that the SERS intensity can be enhanced by considering a device where each nanolens is replaced by an assembly of combined multiple nanolenses, as reported in Figure for devices with a number of nanolenses ranging from one to four.…”

Section: Complex Nanoplasmonic Materials For Integrated and Ultrafastmentioning

confidence: 99%

Evolutionary Photonics for Renewable Energy, Nanomedicine, and Advanced Material Engineering

Favraud

Gongora

Fratalocchi

2018

Laser & Photonics Reviews

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Taking inspiration from complex natural phenomena such as chaos and unpredictability, as well as highly optimized organisms constituted by multitudes of interacting cells, evolutionary photonics aims at developing new sustainable technologies for renewable energy production, bioimaging, and scalable materials with advanced optical functionalities. These photonics systems integrate complex dielectric and/or metallic units into large networks of heterogeneous elements, which are entirely controlled by acting on the interactions among the different units that compose the network. This Review presents a selection of recent results in this research field, discussing advantages, challenges and perspectives of this technology in addressing global challenges in several scientific areas, ranging from broadband light energy harvesting, to scalable clean water production, early‐stage cancer detection, sensing, artificial intelligence, invisible structures, and to large‐scale optical materials with programmable functionality and robust structural coloration.

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“…[13] where gold nanolenses obtained by ablation were shown to provide enhancement G SERS ∼ 10 9 . Yet another experimental progress was top-down nanofabrication of various nanolenses with the number of the individual nanospheres ranging between three and eight [54,55]. These nanospheres provided single-molecule or a fewmolecule SERS sensitivity and were used, in particular, to detect point-like mutations in peptides related to the protein encoded by the BRCA1 (breast cancer suppressor) gene [54].…”

Section: Shape Enhancement Of Sers In Nanolensesmentioning

confidence: 99%

Nanoplasmonics Fundamentals and Surface-Enhanced Raman Scattering as a Physical Phenomenon

Stockman¹

2017

Recent Developments in Plasmon-Supported Raman Spectroscopy

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Few molecule SERS detection using nanolens based plasmonic nanostructure: application to point mutation detection

Abstract: Self-similar chain based nanolens plasmonic devices were fabricated for detecting single point mutations.

Cited by 7 publications

References 44 publications

Nanotip-assisted photoreduction of silver nanostructures on chemically patterned ferroelectric crystals for surface enhanced Raman scattering

Nanotip-assisted photoreduction of silver nanostructures on chemically patterned ferroelectric crystals for surface enhanced Raman scattering

Evolutionary Photonics for Renewable Energy, Nanomedicine, and Advanced Material Engineering

Nanoplasmonics Fundamentals and Surface-Enhanced Raman Scattering as a Physical Phenomenon

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