GNPs-QDs core–satellites assembly: trimodal platform for on-site identification and detection of TNT in complex media

Gao, Rui; Li, Dan; Zhang, Qinmei; Zheng, Siqing; Ren, Xiangling; Deng, Wei

doi:10.1016/j.snb.2020.128960

Cited by 29 publications

(20 citation statements)

References 38 publications

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“…These types of multifunctional nanostructures are generally produced in multistep processes where the individual components are separately synthesized and subsequently assembled. 2,68,74,75 3. SERS sensing applications SERS-sensing with positively-charged nanostructures typically relies on electrostatic binding of the target species with the amino groups of the surface ligand to promote its adhesion onto the plasmonic surface while the detection is mostly achieved via the acquisition of the intrinsic SERS spectrum of the analyte (i.e., direct SERS).…”

Section: Small Moleculesmentioning

confidence: 99%

“…In addition to inorganic anions, a large set of small negativelycharged organic molecules such as explosives, 22,48,68,70,71,[81][82][83] pollutants, 28,66,73,84,85 and pigments 25,31,44 has been targeted by SERS-sensing approaches using positively-charged plasmonic nanomaterials.…”

Section: Small Organic Moleculesmentioning

confidence: 99%

“…6A ). In a recent study, Gao et al 68 generated core-satellite structures via electrostatic assembling of cysteamine-modified gold nanoparticles (core) with negatively-charged mercaptopropionic acid-capped CdTe quantum dots (satellites, QDs), which causes the QD photoluminescence quenching due to energy transfer ( Fig. 6B ).…”

Section: Sers Sensing Applicationsmentioning

confidence: 99%

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Positively-charged plasmonic nanostructures for SERS sensing applications

et al. 2022

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Section: Small Moleculesmentioning

confidence: 99%

Section: Small Organic Moleculesmentioning

confidence: 99%

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Positively-charged plasmonic nanostructures for SERS sensing applications

et al. 2022

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“…As of now, a number of different fluorescent chemosensors/probes have been effectively applied for the sensitive detection of conventional explosives, such as nitroaromatic compounds (NACs). These sensing probes mainly rely on photo-induced electron transfer (PET) from the electron-rich fluorophore to the -NO 2 group comprising electron-deficient NACs …”

Section: Introductionmentioning

confidence: 99%

“…These sensing probes mainly rely on photo-induced electron transfer (PET) from the electron-rich fluorophore to the -NO 2 group comprising electron-deficient NACs. 10 In optical sensors' design, the choice of materials plays an important role. 11 In general, there are two main classes of organic materials for fluorescent sensor applications.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Detection of Nitro Compounds Using a Fluorescent Copolymer-Based FRET System

Kumar

Saini

Choudhury

et al. 2021

ACS Appl. Polym. Mater.

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We report here that optically resonant donor copolymers are used to amplify the sensitivity of an electron-rich fluorescent copolymer toward electron-deficient nitroaromatic compounds (NACs). In a polymer−polymer system, we found that ultrafast Forster resonance energy transfer (FRET) enhances the sensitivity of the primeval fluorescent polymer sensor by 6-fold approximately toward the conventional NACs like 2,4-dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT), and 2,4,6-trinitrophenol (TNP). The present article reports an optical sensor for sensitive detection of NACs by using a fluorescent probe based on FRET phenomena between P[DMA-co-(Boc-Trp-EMA)] (RP) bearing a tryptophan derivative as a donor and P[MMA-co-(Ala-HEMA)-co-(Dansyl-Ala-HEMA)] (DCP) bearing a dansyl derivative in the side chain as an acceptor. This elegant method thus paves the way to achieving a sensitivity <1 μM with a very high value of Stern−Volmer constant. Further, UV−vis absorbance spectroscopy, cyclic voltammetry, ultrafast transient absorption spectroscopy, time-resolved, and steady-state fluorescence spectroscopy were performed to establish the quenching mechanism comprehensively. We also carried out a contact mode analysis in solid-state phase through strip tests for visual detection of NACs in ambient conditions. This unique and quality performance of our sensing probe makes it convenient for naked-eye detection and therefore gives an escalation for stand-alone sensors for NACs, particularly reinforcement in the field of analytical and forensic sciences.

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Applications of surface‐enhanced Raman spectroscopy based on portable Raman spectrometers: A review of recent developments

Wang

Song

2022

Luminescence

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Recently, the surface‐enhanced Raman spectroscopy (SERS) technique emerges as a potential promising analytical tool for rapid, sensitive, and selective detection which can provide unique information about the substances in the presence of plasmonic nanostructures via finger‐printing SERS spectra. The progress in nanostructure SERS substrates and portable Raman spectrometers will promote this novel detection technique to play an important role in the future rapid on‐site assay. In this review, we summarized the latest research on SERS detection technique combined based on nanostructure SERS‐active substrates with portable Raman spectrometers and their potential on‐site detection applications in environment pollutants, agricultural pollutants, biomedical analysis, and other newly emerging fields (focusing particularly on the last 5 years of research). The future perspective of SERS for on‐site analysis is also discussed.

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GNPs-QDs core–satellites assembly: trimodal platform for on-site identification and detection of TNT in complex media

Cited by 29 publications

References 38 publications

Positively-charged plasmonic nanostructures for SERS sensing applications

Positively-charged plasmonic nanostructures for SERS sensing applications

Highly Sensitive Detection of Nitro Compounds Using a Fluorescent Copolymer-Based FRET System

Applications of surface‐enhanced Raman spectroscopy based on portable Raman spectrometers: A review of recent developments

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