Soft UV nanoimprint lithography-designed highly sensitive substrates for SERS detection

Cottat, Maximilien; Lidgi‐Guigui, Nathalie; Tijunelyte, Inga; Barbillon, Grégory; Hamouda, Frédéric; Gogol, Philippe; Aassime, Abdelhanin; Lourtioz, Jean‐Michel; Bartenlian, B.; Chapelle, Marc Lamy de la

doi:10.1186/1556-276x-9-623

Cited by 79 publications

(52 citation statements)

References 27 publications

(25 reference statements)

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“…In the Raman experiment, the number of excited molecules N Raman is 4.22 Â 10 15 . This number is obtained by [22]: N Raman = N A Â C Â V, where C is the used concentration of Thiophenol (1 M), and V is the scattering volume and equal to 7 nL. A maximum experimental EF value of 2.6 Â 10 7 is found (see Table 1) for our system with the highest density (diameter of 110 nm, and periodicity of 150 nm).…”

Section: Resultsmentioning

confidence: 99%

Density effect of gold nanodisks on the SERS intensity for a highly sensitive detection of chemical molecules

et al. 2015

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International audienceSurface-enhanced Raman scattering (SERS) is a sensitive and widely used as spectroscopic technique for chemical and biological structure analysis. One of the keys to increase the sensitivity of SERS sensors is to use nanoparticles/nanostructures. Here, we report on the density effect of gold nanodisks on SERS intensity for a highly sensitive detection of chemical molecules. Various densities of gold nanodisks with a height of 30 nm on gold/glass substrate were fabricated by electron beam lithography in order to have a good uniformity and reproducibility. The evolution of the enhancement factor (EF) with nanodisk density was quantified and compared to numerical calculations. An EF as high as 2:6 Â 10 7 was measured for the nanodisk with a diameter of 110 nm and a periodicity of 150 nm which corresponds to the highest density (42.2 %)

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Section: Resultsmentioning

confidence: 99%

Density effect of gold nanodisks on the SERS intensity for a highly sensitive detection of chemical molecules

et al. 2015

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“…Zhang et al used ultraviolet nanoimprint lithography to fabricate an array of nanocones made of a polymeric material that was subsequently covered with a gold layer: The resulting SERS substrate showed a good G SERS (~10 7 ) and also a remarkable flexibility. The fabrication of SERS substrates formed by arrays of nanocylinders, nanopillars decorated with gold NPs, nanowells, and nanovoids has been also reported in the literature. G SERS ranged in between 10 4 and 10 7 , and active areas have been reported up to ~1 cm 2 .…”

Section: Sers Substratesmentioning

confidence: 99%

SERS detection of food contaminants by means of portable Raman instruments

Pilot

2018

J Raman Spectroscopy

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Surface‐enhanced Raman scattering (SERS) has been emerging as a powerful tool for the detection of a variety of analytes due to its very high sensitivity and fingerprinting recognition capabilities. Technological progresses in the equipment for Raman analysis are contributing to its transition from a technically demanding research method to a more widely available analytical technique. In particular, the commercialization of portable or handheld instruments has opened up the possibility of performing in situ analysis. In this review, a selection of the SERS substrates that are expected to be more suitable for use in combination with portable instruments is presented: Substrates are compared, for example, in terms of performance, reproducibility, ease of fabrication, and surface area. Moreover, this paper provides a survey of the current diffusion of portable Raman instruments in the SERS detection of food contaminants: The investigation of several analytes is summarized (mainly toxins, virus, bacteria, pesticides, forbidden food dyes, and preservatives), reporting on the limits of detection and on the eventual coupling with concentration or separation techniques. A brief perspective on possible future developments of the SERS detection with portable instruments is also provided.

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“…UV‐assisted NIL has also demonstrated great potential in the preparation of micropatterned surfaces for cell–substrate interaction studies, biomimetic surfaces with anisotropic friction‐reducing properties, and with controlled wettability . Periodic structures generated by UV‐assisted NIL have found also large interest as sensitive substrates for surface‐enhanced Raman scattering detection, or in the preparation of optical elements such as wire‐grid polarizers, antireflective surfaces, and enhancement foils for photovoltaic or optoelectronic devices . As an example, Konstantanos and coworkers demonstrated improvement of the photocurrent in solution‐processed solar cells by patterning the transparent conductive oxide electrode with an array of holes.…”

Section: Structuring Techniques For Light‐sensitive Polymersmentioning

confidence: 99%

Light to Shape the Future: From Photolithography to 4D Printing

Barrio

Sánchez‐Somolinos

2019

Advanced Optical Materials

170

147

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producing increasingly complex patterned films and miniaturized devices, which are required in modern information and communication technologies. [1] In addition to semiconductor device fabrication, a host of applications for patterned thin films and structured polymeric systems have been identified over the last two decades in areas including optics, energy harvesting, biotechnology, and medicine. [2] Our ability to structure polymeric materials has grown tremendously and the palette of materials and techniques to achieve a quick and reliable production of patterns with increasing resolution is quite extensive. This boom has been largely sustained by the development of specific photonic technologies, such as advanced light sources or spatial light modulators, photosensitive materials, and, more importantly, our growing knowledge of the interaction between light and matter. Indeed, the ability to control a chemical reaction with light in a remote fashion is a powerful concept. Light irradiation can initiate a photochemical process that otherwise would not occur at ambient conditions. This property lies at the origin of the temporal control afforded by simply turning the light source on and off. Moreover, patterned illumination or the use of focused light beams enables control of not only when, but also where a photoinduced transformation occurs. The photochemical processes occurring in many polymers and resists can be effectively manipulated by fine-tuning the intensity and frequency of light. However, these are just two of the primary properties of light, and there are specific photoresponsive systems that enable the generation of ordered structures by adjusting the polarization of light, in addition to intensity and frequency.In this review, an overview of photochemical reactions, photosensitive polymers, and light-based structuring techniques is provided. As this field is too broad to be covered in depth in one single article, some recent examples and applications, as well as emerging opportunities and trends, are highlighted throughout the discussion. Section 2 is focused on light-induced reactions and photosensitive materials. The fundamentals of photochemical reactions and their implementation in polymer science have been overviewed in many excellent books and reviews. [3] In Section 2, rather than being comprehensive, emphasis is given to those photochemical processes lying at the basis of those structuring techniques that are later discussed in Section 3. Some of these techniques, including conventional mask lithographies, interference lithographies, direct laser writing (DLW) with one-or two-photon processes, or stereolithographic techniques, make use of light as a structuring tool.There is an additional group of techniques where light is employed to set a structure created beforehand through a Over the last few decades, the demand of polymeric structures with welldefined features of different size, dimension, and functionality has increased from various application areas, including microelectronics, ...

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Soft UV nanoimprint lithography-designed highly sensitive substrates for SERS detection

Cited by 79 publications

References 27 publications

Density effect of gold nanodisks on the SERS intensity for a highly sensitive detection of chemical molecules

Density effect of gold nanodisks on the SERS intensity for a highly sensitive detection of chemical molecules

SERS detection of food contaminants by means of portable Raman instruments

Light to Shape the Future: From Photolithography to 4D Printing

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