Hydrochromic carbon dots as smart sensors for water sensing in organic solvents

Anitha, S.; Fragouli, Despina; Balusamy, Brabu; Patil, Bhushan; Palei, Milan; Sabella, Stefania; Uyar, Tamer; Athanassiou, Athanassia

doi:10.1039/c9na00493a

Cited by 43 publications

(27 citation statements)

References 76 publications

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“…Carbon dots were prepared by carbonization of brown sugar. A detailed characterization has been published previously by our group [34]: their diameter was measured to be ca. 4.12 ± 0.54 nm and their emission spectrum was centered at 448 nm under an excitation of 300 nm.…”

Section: Resultsmentioning

confidence: 99%

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Paper Sensors Based on Fluorescence Changes of Carbon Nanodots for Optical Detection of Nanomaterials

et al. 2021

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A paper sensor was designed in order to detect the presence of nanomaterials, such as ZnO and silica nanoparticles, as well as graphene nanoplatelets (GnP), based on fluorescence changes of carbon nanodots. Paper strips were functionalized with carbon nanodots using polyvinyl alcohol (PVA) as binder. The carbon nanodots were highly fluorescent and, hence, rendered the (cellulosic) paper stripes emissive. In the presence of silica and ZnO nanoparticles, the fluorescence emission of the carbon nanodots was quenched and the emission decay was shortened, whereas in the presence of GnP only emission quenching occurred. These different photoluminescence (PL) quenching mechanisms, which are evident from lifetime measurements, convey selectivity to the sensor. The change in fluorescence of the carbon dot-functionalized paper is also evident to the naked eye under illumination with a UV lamp, which enables easy detection of the nanomaterials. The sensor was able to detect the nanomaterials upon direct contact, either by dipping it in their aqueous dispersions, or by sweeping it over their powders. The use of the proposed optical sensor permits the detection of nanomaterials in a straightforward manner, opening new ways for the development of optical sensors for practical applications.

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Section: Resultsmentioning

confidence: 99%

“…Carbon dots were prepared following the procedure described in our previous work [34]. In short, equal amounts of brown sugar and water were heated in a furnace at 180 • C (5 • C/min) for 48 h, resulting in carbonization.…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

Paper Sensors Based on Fluorescence Changes of Carbon Nanodots for Optical Detection of Nanomaterials

et al. 2021

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“…The CDs exhibited red shift in the presence of water in aprotic solvents, whereas, in protic solvents, the emission intensity was increased. Therefore, this property of the CD was employed to probe water contamination in different solvents [ 133 ]. Different solvents have different emission wavelengths.…”

Section: Cds As Smart Materialsmentioning

confidence: 99%

Carbon Dots: An Emerging Smart Material for Analytical Applications

2021

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Carbon dots (CDs) are optically active carbon-based nanomaterials. These nanomaterials can change their light emission properties in response to various external stimuli such as pH, temperature, pressure, and light. The CD’s remarkable stimuli-responsive smart material properties have recently stimulated massive research interest for their exploitation to develop various sensor platforms. Herein, an effort has been made to review the major advances made on CDs, focusing mainly on its smart material attributes and linked applications. Since the CD’s material properties are largely linked to their synthesis approaches, various synthesis methods, including surface passivation and functionalization of CDs and the mechanisms reported so far in their photophysical properties, are also delineated in this review. Finally, the challenges of using CDs and the scope for their further improvement as an optical signal transducer to expand their application horizon for developing analytical platforms have been discussed.

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“…The kinetics studies revealed slow release of SDZ and also exhibited good inhibitory effects against Escherichia coli and Staphylococcus aureus. The biocompatible nature is a most important parameter for the materials intended for biological applications and their toxicity nature in any possible exposure state should be evaluated for their successful applications [73][74][75][76][77][78]. Therefore, the biocompatible studies conducted on the PLA nanofibers containing SDZ and [Mg-Al]-LDH has shown good biocompatible nature in the human HDFn cells.…”

Section: Synthetic Polymeric Nanofibers Based Wound Dressingsmentioning

confidence: 99%

Electrospun Nanofibers for Wound Dressing and Tissue Engineering Applications

Balusamy

Anitha

Uyar

2020

Hacettepe Journal of Biology and Chemistry

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E lektro-eğirme yöntemi ile üretilen nanolifler, son yıllarda nanofibröz yapı iskelelerinin geliştirilmesinde büyük ilgi gördü ve biyomimetik yapıları nedeniyle farklı biyomedikal uygulamalarda kullanıldı. Özellikle, elektro-eğirme yöntemi ile üretilen nanolifler doğal hücre dışı matris (ECM), birbirine bağlı gözenekler, geniş yüzey alanı, işlevselleştirme kolaylığı ve hücre adezyonunu, farklılaşmasını ve proliferasyon davranışını etkilemede büyük önem taşıyan mekanik performans dahil olmak üzere birçok faydalı özellik sergiler. Bugüne kadar, çok çeşitli yararlı özellikleri kabul eden bu nanolifler, yara örtüsü ve doku mühendisliği uygulamalarında kullanılmıştır. Bu derlemede, çeşitli malzemelerin ve yaklaşımların kullanımını gösteren birkaç temsili örneklerle bu alanlarda çeşitli çabaların yapıldığını özetlemektedir. Ayrıca, klinik faz transferine ilişkin gelecekteki yön endişeleri tartışılmıştır. Anahtar Kelimeler Elektro-eğirme, nanolif, yara örtüsü, doku mühendisliği.

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Hydrochromic carbon dots as smart sensors for water sensing in organic solvents

Abstract: The present study highlights the potential of using hydrochromic carbon dots as probes for sensing water contamination in organic solvents.

Cited by 43 publications

References 76 publications

Paper Sensors Based on Fluorescence Changes of Carbon Nanodots for Optical Detection of Nanomaterials

Paper Sensors Based on Fluorescence Changes of Carbon Nanodots for Optical Detection of Nanomaterials

Carbon Dots: An Emerging Smart Material for Analytical Applications

Electrospun Nanofibers for Wound Dressing and Tissue Engineering Applications

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