Plasmonic-3D photonic crystals microchip for surface enhanced Raman spectroscopy

Chen, Guojian; Zhang, Kelian; Luo, Baibin; Hong, Wei; Chen, Jian; Chen, Xudong

doi:10.1016/j.bios.2019.111596

Cited by 35 publications

(16 citation statements)

References 44 publications

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“…The synergistic effect of photonic and plasmonic enhancement has furthermore been confirmed in hybrid materials. 157 , 158 Mu et al ( 157 ) developed antibody-functionalized inverse opal hydrogels with stained AgNPs for multiplexed analysis of proteins ( Figure 13 d). This hybrid material benefits from both the inverse opal hydrogels with high binding site densities, and a high density of hotspots, as well as an extra enhancement caused by a coupling of the Bragg and plasmonic modes.…”

Section: Sers-based Sensingmentioning

confidence: 99%

Bottom-Up Assembled Photonic Crystals for Structure-Enabled Label-Free Sensing

et al. 2021

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Photonic crystals (PhCs) display photonic stop bands (PSBs) and at the edges of these PSBs transport light with reduced velocity, enabling the PhCs to confine and manipulate incident light with enhanced light–matter interaction. Intense research has been devoted to leveraging the optical properties of PhCs for the development of optical sensors for bioassays, diagnosis, and environmental monitoring. These applications have furthermore benefited from the inherently large surface area of PhCs, giving rise to high analyte adsorption and the wide range of options for structural variations of the PhCs leading to enhanced light–matter interaction. Here, we focus on bottom-up assembled PhCs and review the significant advances that have been made in their use as label-free sensors. We describe their potential for point-of-care devices and in the review include their structural design, constituent materials, fabrication strategy, and sensing working principles. We thereby classify them according to five sensing principles: sensing of refractive index variations, sensing by lattice spacing variations, enhanced fluorescence spectroscopy, surface-enhanced Raman spectroscopy, and configuration transitions.

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Section: Sers-based Sensingmentioning

confidence: 99%

Bottom-Up Assembled Photonic Crystals for Structure-Enabled Label-Free Sensing

et al. 2021

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“…The detection limit of adenine molecules by gold and silver-based SERS sensors has been reported to range mainly from 10 −8 M to 10 −9 M [16][17][18][19][20]. Some research groups reported the detection of adenine molecules at a lower concentration of 10 −10 M [21] and 10 −11 M [22].…”

Section: Introductionmentioning

confidence: 99%

Silver SERS Adenine Sensors with a Very Low Detection Limit

Tzeng

Lin

2020

Biosensors

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The detection of adenine molecules at very low concentrations is important for biological and medical research and applications. This paper reports a silver-based surface-enhanced Raman scattering (SERS) sensor with a very low detection limit for adenine molecules. Clusters of closely packed silver nanoparticles on surfaces of discrete ball-like copper bumps partially covered with graphene are deposited by immersion in silver nitrate. These clusters of silver nanoparticles exhibit abundant nanogaps between nanoparticles, where plasmonic coupling induces very high local electromagnetic fields. Silver nanoparticles growing perpendicularly on ball-like copper bumps exhibit surfaces of large curvature, where electromagnetic field enhancement is high. Between discrete ball-like copper bumps, the local electromagnetic field is low. Silver is not deposited on the low-field surface area. Adenine molecules interact with silver by both electrostatic and functional groups and exhibit low surface diffusivity on silver surface. Adenine molecules are less likely to adsorb on low-field sensor surface without silver. Therefore, adenine molecules have a high probability of adsorbing on silver surface of high local electric fields and contribute to the measured Raman scattering signal strength. We demonstrated SERS sensors made of clusters of silver nanoparticles deposited on discrete ball-like copper bumps with very a low detection limit for detecting adenine water solution of a concentration as low as 10−11 M.

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“…To better understanding IO structures, it is important to first know about the concept of PC and opaline arrays. PCs defined as the highly ordered structures which have a variation in dielectric constant and the scale of visible light wavelengths (400–800 nm) periodically [ 29 ]. The opaline films which are PCs materials usually were formed by polystyrene (PS), polymethyl methacrylate (PMMA) and silica (SiO 2 ) nano or microspheres on the glass substrate [ 30 ].…”

Section: An Overview To Io Pc Structures and Fabricationsmentioning

confidence: 99%

Photonic crystal based biosensors: Emerging inverse opals for biomarker detection

Fathi

Rashidi

Pakchin

et al. 2021

Talanta

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Photonic crystal (PC)-based inverse opal (IO) arrays are one of the substrates for label-free sensing mechanism. IO-based materials with their advanced and ordered three-dimensional microporous structures have recently found attractive optical sensor and biological applications in the detection of biomolecules like proteins, DNA, viruses, etc. The unique optical and structural properties of IO materials can simplify the improvements in non-destructive optical study capabilities for point of care testing (POCT) used within a wide variety of biosensor research. In this review, which is an interdisciplinary investigation among nanotechnology, biology, chemistry and medical sciences, the recent fabrication methodologies and the main challenges regarding the application of (inverse opals) IOs in terms of their bio-sensing capability are summarized.

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Plasmonic-3D photonic crystals microchip for surface enhanced Raman spectroscopy

Cited by 35 publications

References 44 publications

Bottom-Up Assembled Photonic Crystals for Structure-Enabled Label-Free Sensing

Bottom-Up Assembled Photonic Crystals for Structure-Enabled Label-Free Sensing

Silver SERS Adenine Sensors with a Very Low Detection Limit

Photonic crystal based biosensors: Emerging inverse opals for biomarker detection

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