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Plasmonic sensors based on graphene and graphene hybrid materials
Zhang Zhichao,Lee Yeageun,Haque Md Farhadul,Leem Juyoung,Hsieh Ezekiel Y.,Nam SungWoo 나노기술연구협의회 2022 Nano Convergence Vol.9 No.28
The past decade has witnessed a rapid growth of graphene plasmonics and their applications in different fields. Compared with conventional plasmonic materials, graphene enables highly confined plasmons with much longer lifetimes. Moreover, graphene plasmons work in an extended wavelength range, i.e., mid-infrared and terahertz regime, overlapping with the fingerprints of most organic and biomolecules, and have broadened their applications towards plasmonic biological and chemical sensors. In this review, we discuss intrinsic plasmonic properties of graphene and strategies both for tuning graphene plasmons as well as achieving higher performance by integrating graphene with plasmonic nanostructures. Next, we survey applications of graphene and graphene-hybrid materials in biosensors, chemical sensors, optical sensors, and sensors in other fields. Lastly, we conclude this review by providing a brief outlook and challenges of the field. Through this review, we aim to provide an overall picture of graphene plasmonic sensing and to suggest future trends of development of graphene plasmonics.
Hong, Hyun Young,Ha, Jeong Sook,Lee, Sang-Soo,Park, Jong Hyuk American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.5
<P>Silver (Ag) is a promising material for manipulation of surface plasmon polaritons (SPPs), due to its optical and electrical properties; however, the intrinsic properties are easily degraded by surface corrosion under atmospheric conditions, restricting its applications in plasmonics. Here, we address this issue via single-crystalline Ag films protected with graphene layers and demonstrate effective propagation of SPPs on the graphene-protected Ag films. Single-crystalline Ag films with atomically flat surfaces are prepared by epitaxial growth; graphene layers are then transferred onto the Ag films. The propagation lengths of SPPs on the graphene-protected Ag films are measured, and their variations under corrosive conditions are investigated. The initial SPP propagation lengths for the bare Ag films are very long (about 50 pm in the wavelength range 550-700 nm). However, the values decrease significantly (11-13 mu m) under corrosive conditions. On the contrary, the double-layer-graphene-protected Ag films exhibit SPP propagation lengths of about 23 pm and retain over 90% (21-23 mu m) of the propagation lengths even after exposure to corrosive conditions, guaranteeing the reliability of Ag plasmonic devices. This approach can encourage extending the application of the graphene metal hybrid structure and thus developing Ag plasmonic devices.</P>
Classical Plasmonics: Wave Propagation Control at Subwavelength Scale
Víctor Coello,Cesar E. Garcia-Ortiz,Manuel Garcia-Mendez 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.7
In this paper, surface plasmons polariton propagation and manipulation is reviewed in the context of experiments and modeling of optical images. We focus our attention in the interaction of surface plasmon polaritons with arrays of micro-scatereres and nanofabricated structures. Numerical simulations and experimental results of different plasmonic devices are presented. Plasmonic beam manipulation opens up numerous possibilities for application in biosensing, nanophotonics, and in general in the area of surface optics properties.
Hybrid Nanosystem based on Plasmonic-Carbon Nanomaterials for Molecular Detection
이승현 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Nobel metal nanoparticles with different sizes and shapes have attracted a great deal of recent interest due to their unique optical properties as a result of localized surface plasmon resonances (LSPR) which produces a strong optical extinction which can be tuned throughout the visible and near-infrared wavelengths. The plasmonic nanoparticles arrays can serve as potential sensor substrates for the label-free sensing of a range of targets. It has also been shown that near-field enhancements at the sharp plasmonic edges and critical for signal enhancement by inter-particle optical coupling can be observed due to LSPR. The LSPR has been exploited to develop highly sensitive biological sensing, molecular imaging, and surface-enhanced Raman spectroscopy (SERS). Here, SERS-active substrates with plasmonic-carbon hybrid nanostructures for molecular detections and metal nanoparticles embedded inside carbon nanotube for virus removal will be also discussed.
정경화,( Adila Rani ),김동하 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
A simple strategy for the sensitivity enhancement of SPR sensors was demonstrated with layer-by-layer self-assembled graphene oxide on Au film. Refractive index sensitivity was estimated by calculating Fresnel equation and RI sensing was performed with glycerin solution of different concentrations. The experimental results were compared with calculation study. In both studies, graphene deposition resulted in the higher sensitivity. Graphene with unique optical properties contributed to improve the refractive index sensitivity of SPR sensor chip through the coupling of surface plasmon polariton and graphene plasmons.
Controlled assembly of gold nanoparticles: Methods and plasmon coupling properties
윤상운 대한화학회 2024 Bulletin of the Korean Chemical Society Vol.45 No.8
Gold nanoparticles (AuNPs) exhibit excellent plasmonic properties, including bright color and generation of localized electric field, hot carriers, and heat. These properties are widely applied in biology, sensing, spectroscopy, catalysis, and medicine. More attractive is that these properties are tremendously enhanced when AuNPs are assembled and form nanogaps between the particles. Therefore, assembling AuNPs in a controlled fashion is a key step for the study and applications of plasmonic properties. In this Account, I will introduce my group's collective efforts that have been made for a decade to develop the best assembly method. I will describe the assembly procedure in detail and demonstrate the various nanoassemblies produced by the method. The controlled assembly allows us to systematically examine the relationship between the plasmonic properties and structural parameters of the nanogaps. Among many properties, I focus on plasmon coupling. To conclude, I will discuss the prospects of nanoassembly plasmonics.
Plasmon-enhanced Infrared Spectroscopy Based on Metasurface Absorber with Vertical Nanogap
( Inyong Hwang ),( Jongwon Lee ),( Joo-yun Jung ) 한국센서학회 2018 센서학회지 Vol.27 No.5
In this study, we introduce a sensing platform based on a plasmonic metasurface absorber (MA) with a vertical nanogap for the ultrasensitive detection of monolayer molecules. The vertical nanogap of the MA, where the extremely high near-field is uniformly distributed and exposed to the external environment, is formed by an under-cut structure between a metallic cross nanoantenna and the mirror layer. The accessible sensing area and the enhanced near-field of the MA further enhance the sensitivity of surface-enhanced infrared absorption for the target molecule of 1-octadecanethiol. To provide strong coupling between the molecular vibrations and plasmonic resonance, the design parameters of the MA with a vertical nanogap are numerically designed.
유수빈,장도협,Swarup Kumar Maji,정경화,이준상,Filipe Marques Mota,Jianfang Wang,김세훈,김동하 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.104 No.-
In the exploitation of nanozymes possessing intrinsic enzyme-like activities for cancer therapy, minorfocus has been devoted to plasmonic nanostructures with localized surface plasmon resonance (LSPR)-driven properties. Here, we report the application of unique peroxidase-mimicking plasmonic photonanozymescoupling tumor-microenvironment-responsive reactive oxygen species generation with photothermaleffect for effective combinatorial therapy. The well-defined anisotropic photo-nanozyme issynthesized by selectively depositing Pd nanoparticles on the tips of gold nanobypyramids. Intrinsicperoxidase-like properties with 1.5-fold-activity enhancement under photoexcitation are ascribed to aPd-induced hot electrons/holes separation with efficient H2O2 decomposition. The LSPR-induced photocatalytic/photothermal combinatorial effects are remarkably enhanced upon H2O2 addition, criticallysuppressing the cell survival rate under near-infrared light. An effective decomposition of cellsignalingH2O2 additionally reveals prominent expression hindrance of vascular endothelial growth factorand hypoxia-inducible factor 1a. Our seminal findings uncover an interrelation between LSPR-inducedphenomena and biomimetic fingerprints, valuable to overcome the shortcomings of conventional photodynamictherapy.