Cited 1 time in webofscience Cited 1 time in scopus

Enhanced color sensitivity by coupling of surface plasmon and fabry-perot resonances for spectrometer-free and label-free biosensing

Title
Enhanced color sensitivity by coupling of surface plasmon and fabry-perot resonances for spectrometer-free and label-free biosensing
Authors
Kim, SeungukKim, Jae YeonHeo, Su JinYang, Jae HoonSon, GowoonJang, Hyun WooChoi, Jihwan P.Hwang, Jae YounMoon, CheilJang, Jae Eun
DGIST Authors
Kim, Seunguk; Kim, Jae Yeon; Heo, Su Jin; Yang, Jae Hoon; Son, Gowoon; Jang, Hyun Woo; Choi, Jihwan P.; Hwang, Jae YounMoon, CheilJang, Jae Eun
Issue Date
2020-09
Citation
Sensors and Actuators, B: Chemical, 319, 128301
Type
Article
Article Type
Article
Author Keywords
Color sensitivityFabry-Perot cavityImage processingPlasmonic biosensorRefractive index detection
Keywords
DARK-FIELD MICROSCOPYOPTICAL SENSORARRAYSNANOPARTICLES
ISSN
0925-4005
Abstract
Plasmonic sensors have received much attention in recent years since they are highly sensitive to the refractive index changes of surrounding dielectric and can be applied to spectrometer-free biosensing. In particular, the sensing based on the color factors and the imaging is considered as a powerful method due to its simplified sensing process as well as high sensitivity with high spatial resolution. Herein, we report on improvement in the color sensitivity to the refractive index changes by employing an aluminum-silicon dioxide-aluminum (AOA) structure consisted of the Fabry-Perot (FP) cavity sandwiched between double surface plasmonic (SP) layers. The coupling of SP and FP resonances in aluminum nanohole arrays and silicon dioxide cavity lead to the synergistic or attenuated change in transmission spectra and colors. Therefore, as optimizing the coupling of the resonances to increase the color change, it is possible to obtain enhanced color sensitivity and more accurate refractive index prediction. Color sensitivities up to 122.29 (L*), 169.58 (a*), and 174.72 (b*) RIU−1 of the CIELAB color space are achieved through imaging process and statistical analysis. Uniform and sensitive sensing factors of AOA sensors can distinguish the concentration difference of bovine serum albumin (BSA) with a limit of detection of 9 × 10-4 RIU. Moreover, this approach confirms the possibility of being used for in vivo detection by observing the intracellular structure of HEK-293 cells. Our AOA sensor suggests a great potential to be utilized as a spectrometer-free, label-free, and functionalization-free detection of the refractive index and the transparent biomaterials. © 2020 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/12104
DOI
10.1016/j.snb.2020.128301
Publisher
Elsevier BV
Related Researcher
  • Author Jang, Jae Eun Advanced Electronic Devices Research Group(AEDRG) - Jang Lab.
  • Research Interests Nanoelectroinc device; 생체 신호 센싱 시스템 및 생체 모방 디바이스; 나노 통신 디바이스
Files:
There are no files associated with this item.
Collection:
Department of Information and Communication EngineeringNCRG(Networks and Communications Research Group)1. Journal Articles
Department of Information and Communication EngineeringMBIS(Multimodal Biomedical Imaging and System) Laboratory1. Journal Articles
Department of Brain and Cognitive SciencesLaboratory of Chemical Senses1. Journal Articles
Department of Information and Communication EngineeringAdvanced Electronic Devices Research Group(AEDRG) - Jang Lab.1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE