2020
DOI: 10.1016/j.trac.2019.115754
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Colorimetric sensor array based on gold nanoparticles: Design principles and recent advances

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Cited by 192 publications
(99 citation statements)
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“…During the past few years, various types of nanomaterials with unique optical properties have been extensively applied to develop sensitive biosensors for EV analysis [ 21 , 47 ]. Among the optical techniques, a promising nanotechnology-based colorimetric biosensor has been established to detect exosomal biomarkers with the naked eye based on the extinction coefficient [ 48 , 49 , 50 ].…”
Section: Colorimetric/fluorescence-based Analysis Methods For Ev Dmentioning
confidence: 99%
“…During the past few years, various types of nanomaterials with unique optical properties have been extensively applied to develop sensitive biosensors for EV analysis [ 21 , 47 ]. Among the optical techniques, a promising nanotechnology-based colorimetric biosensor has been established to detect exosomal biomarkers with the naked eye based on the extinction coefficient [ 48 , 49 , 50 ].…”
Section: Colorimetric/fluorescence-based Analysis Methods For Ev Dmentioning
confidence: 99%
“…The main disadvantage of LSPR is its lower refractive index sensitivity compared to conventional SPR (Cao, Galbraith, Sun, & Grattan, 2011). Information on SPR and LSPR can further be found in several reviews (Abdulhalim, 2013;Esfahani Monfared, 2020;Roh et al, 2011;Shalabney & Abdulhalim, 2011;Jingwei;Sun et al, 2020;Szunerits, Shalabney, Boukherroub, & Abdulhalim, 2012). Plasmonic properties of a single nanoparticle can be analyzed and monitored by using dark-field microscopy (Anker et al, 2010;Sriram et al, 2018;Sriram, Zong, Vivekchand, & Gooding, 2015).…”
Section: Optical and Plasmonics Biosensorsmentioning
confidence: 99%
“…They are used because of their unique physical and chemical properties (e.g., size and distancedependent optical properties, high stability, quick response time, low toxicity and easy functionalization) (Aldewachi et al 2018;Amendola et al 2014;Jazayeri et al 2018;Yu et al 2020). Among various detection probes for analytes, AuNPs-based colorimetric sensor arrays are specifically prevalent, offering several advantages (e.g., simple synthesis procedures, low-cost, high extinction coefficient, instrument-free, and rapid detection via naked eye under visible light) (Li et al 2019a, b;Sun et al 2019b). Notably, surface plasmon resonance (SPR)-based sensor arrays are the most eminent among various label-free biosensing techniques, rendering sensitive, robust, and easy detection of various analytes (Unser et al 2015;Wang et al 2019).…”
Section: Introductionmentioning
confidence: 99%
“…It is a well-established that the changes occurring in the colloidal solution of AuNPs from red to purple/blue color during aggregation or purple/blue to red during redispersion are mainly due to the varying interparticle plasmon coupling and the surface plasmon band shift (Ghosh and Pal 2007;Kreibig and Genzel 1985;Srivastava et al 2005;Su et al 2003;Yu et al 2020). The change in the color of colloidal AuNPs solution through aggregation/redispersion of nanoparticles forms the basis for fabrication of various AuNPs-based colorimetric sensor arrays (Chang et al 2019;Priyadarshini and Pradhan 2017;Sun et al 2019b). The AuNPs-based colorimetric sensor assays, known to possess high sensitivity because of the high extinction coefficient of AuNPs, is over 1000 times higher compared to the organic dyes (Ghosh and Pal 2007;Liu et al 2007;Zhao et al 2008).…”
Section: Introductionmentioning
confidence: 99%