Gas detection using quenching fluorescence of dye-immobilised silica nanoparticles

Farooq, Asima; Al-Jowder, R.; Narayanaswamy, Ramaier; Azzawi, May; Roche, Phil J.R.; Whitehead, Debra

doi:10.1016/j.snb.2013.03.058

Cited by 27 publications

(14 citation statements)

References 42 publications

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“…Furthermore, the developments of fluorescence in imaging technology offer many enticing prospects, such as assessing the results of disease treatment and improving the current understanding of the biology of disease . For this reason, many researchers introduced the organic fluorescent molecules onto the surface of mesoporous silica to evaluate drug loading and release kinetics by tracking fluorescence signals. For example, Lee et al .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Mesoporous CDQs/BMMs with Strong Fluorescent Property and Sustained Drug Releasing Performance

Sun

Bai

et al. 2020

ChemistrySelect

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A multifunctional mesoporous CQDs/BMMs with strong fluorescent property was synthesized via a facile and reliable solgel approach to dope carbon quantum dots (CQDs) into the bimodal mesopores silica (BMMs) for application in sustained drug releasing performance. In which, the influences of various parameters, including hydrothermal system (glucose concentration, temperature, and time) and removing cetyltrimethyl ammonium bromide (CTAB) conditions (ethanol-HCl, isopropanol-H 2 O, and acetone) on fluorescence performances and structure properties were investigated via PL, UV, XRD, BET, SEM, TEM, EDS, FT-IR, XPS, TG. The result showed that the resultant CQDs/BMMs possesses uniform mesopore structure with larger specific surface area of around 752 m 2 g À 1 , and excitation-independent emission properties at the strongest emission peak of 488 nm. Using ibuprofen as a model drug, their drug delivery behaviours were assessed by UV and mass balance equation, showing a high loading amount (154.3 mg g À 1 within 20 min) and good sustained release performance along with stable and strong fluorescence.[a] Dr.

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Section: Introductionmentioning

confidence: 99%

Multifunctional Mesoporous CDQs/BMMs with Strong Fluorescent Property and Sustained Drug Releasing Performance

Sun

Bai

et al. 2020

ChemistrySelect

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“…Liu et al [12] reported a high sensitivity ammonia sensor based on a tapered small core single-mode fibre structure for the measurement of ammonia concentration in water, and they estimated that the resolution for ammonia concentration in water can reach 4 ppb. Besides, silica nanoparticle has been also used for gas or humidity sensing [13,14]; especially it showed a lower contact angle about 27 ∘ in recent approach [15] that means some contamination may easily be adsorbed.…”

Section: Introductionmentioning

confidence: 99%

Micro/Nanofiber with Hollow Silica Nanoparticles Thin-Film for Airborne Molecular Contaminants Real-Time Sensing

Niu

Zhou

Miao

et al. 2018

Advances in Condensed Matter Physics

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A novel chemical sensing approach detecting airborne molecular contaminants (AMCs) or compounds is demonstrated by using single-mode optical microfibre (OMF) coated with hollow silica nanoparticles (HSNs). The concentration of AMCs, which were volatilized on the surface of the tapered microfibre coated with HSNs, influences the transmission loss of the microfibre. Tapered OMF was fabricated using a high-precision electrically controlled setup, and coatings of HSNs were prepared by meniscus coating method. The transmission loss of three OMFs with different diameters and the same thick coating were tested to determine the relationship between AMC concentrations and transmission loss of coated OMFs. Experimental results showed that the transmission loss increases with increasing concentration of AMCs. The sensitivity for volatile simethicone was 0.0263 dB/mg/m3 obtained by the coated OMF with diameter of 2.5 μm, and the sensitivity values of coated OMF with diameters of 5 μm and 6 μm were 0.0024 and 0.0018 dB/mg/m3, respectively. Thus the proposed coated OMF can be used in enclosed space for AMCs sensing.

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“…[17][18][19][20][21] There are quite a few reports on the detection of SO 2 (ref. [22][23][24][25][26][27] and NO 2 (ref. [28][29][30] and derivatives, [31][32][33][34][35][36][37][38][39][40][41][42][43] which are the essential components in acid rain, through colorimetric, uorescent and optical methods.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence of ZnO/carbon mixture and application in acid rain detection

et al. 2017

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Gas detection using quenching fluorescence of dye-immobilised silica nanoparticles

Cited by 27 publications

References 42 publications

Multifunctional Mesoporous CDQs/BMMs with Strong Fluorescent Property and Sustained Drug Releasing Performance

Multifunctional Mesoporous CDQs/BMMs with Strong Fluorescent Property and Sustained Drug Releasing Performance

Micro/Nanofiber with Hollow Silica Nanoparticles Thin-Film for Airborne Molecular Contaminants Real-Time Sensing

Fluorescence of ZnO/carbon mixture and application in acid rain detection

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