Novel thermal quenching characteristics of luminescent carbon nanodots via tailoring the surface chemical groups

Maiti, Rishi; Mukherjee, Subhrajit; Haldar, Saikat; Bhowmick, Dhiman; Ray, S. K.

doi:10.1016/j.carbon.2016.04.004

Cited by 28 publications

(8 citation statements)

References 32 publications

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“…The significant characteristics of C‐QDs include photoinduced electron transfer, upconversion luminescence, high photocatalytic activity, structural stability under visible light and electron reservoir properties makes them perfect candidates kindling the researchers towards their synthesis by different means . The solvothermal treatment of orange juice in ethanol was adopted to achieve carbon nanodots having thermal quenching of luminescence behavior where the quenching was tuned by annealing process . The as‐synthesized carbon nanodots presented positive thermal quenching and negative thermal quenching of emission was observed in annealed carbon nanodots at 200 °C with respect to increase in measurement temperature.…”

Section: Fabrication Of 2d Qdsmentioning

confidence: 99%

2D–Materials‐Based Quantum Dots: Gateway Towards Next‐Generation Optical Devices

Dhanabalan

Ponraj

et al. 2017

Advanced Optical Materials

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A major focus on graphene‐based two‐dimensional (2D) materials is highlighted in recent days owing to their fascinating properties with widespread applications in electronic devices, catalysis, photonics and medicine. Here, we critically evaluate 2D materials based quantum dots (QDs) to understand the significant ways of fabrication adopted to meet their challenging demands in par with other 2D nanostructures to be in parallel with the current photonic technology with emphasis on future research scope to make use of these materials. We also discuss the different applications of 2D QDs emphasizing the realization of fluorescent probes which are in great demand to well‐establish these materials in the healthcare sector for the betterment of mankind. This study is a key priority and will bring a great impact in the advancement of simple yet challenging 2D QDs by bringing them towards the next level of applications point‐of‐view similar to that of graphene.

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Section: Fabrication Of 2d Qdsmentioning

confidence: 99%

2D–Materials‐Based Quantum Dots: Gateway Towards Next‐Generation Optical Devices

Dhanabalan

Ponraj

et al. 2017

Advanced Optical Materials

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“…[ 2 ] Among these interesting properties, the unique surface structure with abundant active sites, which can make CDs easily functionalized and also endow the capability of CDs to integrate with other materials, has especially gained tremendous attentions. [ 3 ] Owing to these merits, CDs and CD‐based composites promise a wide range of applications in many fields, e.g., bioimaging, [ 4 ] sensing, [ 5 ] catalysis, [ 6 ] optoelectronics, [ 7 ] photovoltaic devices, [ 8 ] and energy storage. [ 9 ] In addition, recent studies have indicated that CDs have also shown great potential application as effective photothermal material for solar‐driven water evaporation.…”

Section: Introductionmentioning

confidence: 99%

Interaction Promotes the Formation and Photothermal Conversion of Carbon Dots/Polydopamine Composite for Solar‐Driven Water Evaporation

Chang

Guo

Shen

et al. 2021

Adv Materials Inter

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Carbon dots modified with polydopamine (CDs/PDA), a low‐cost and environmentally friendly photothermal material, is prepared in this work. The results show that the polymerization of dopamine is significantly accelerated due to the interaction between CDs and dopamine. Importantly, the interaction also greatly promotes nonradiative recombination of photoexcited charge carriers, thereby enhancing the photothermal conversion performance of CDs/PDA. The obtained CDs/PDA composite shows superior photothermal evaporation efficiency in comparison with CDs and PDA owing to the enhanced light absorption, porous structure, and appropriate interaction. In addition, CDs/PDA exhibits excellent stability. These merits enable CDs/PDA show great promise in solar‐energy‐related applications.

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“…The detailed synthesis process of CNDs has been reported elsewhere. 32,33 The whole procedure is depicted in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

“…The detailed synthesis process of CNDs has been reported elsewhere. , The whole procedure is depicted in Figure . In short, pure ethanol was poured in filtered, pulp free orange juice solution in 1:1 volumetric ratio and was mixed by magnetic stirring at 600 rpm (Figure a).…”

Section: Methodsmentioning

confidence: 99%

Solution Processed Highly Responsive UV Photodetectors from Carbon Nanodot/Silicon Heterojunctions

Maiti

Mukherjee

Dey

et al. 2019

ACS Appl. Nano Mater.

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Carbon nanostructures technology has recently emerged as a key enabler for next-generation optoelectronic devices working in the deep UV region due to their excitonic absorption. Here, we report the fabrication of “orange juice” derived solution processed carbon nanodots (CNDs)/n-Si heterojunction showing broadband spectral response with a peak responsivity of ∼1.25 A/W in UV (∼300 nm) wavelength. The surface topography and chemical information on synthesized CNDs via a facile synthesis route have been characterized showing the presence of surface chemical states resulting broad optical emission. The CNDs/n-Si photodiode exhibits very low dark current (∼500 pA), excellent rectification ratio (∼5 × 103), and very good photomodulation in UV region. Our device exhibits better responsivity in DUV than state-of-the-art GaN based photodetectors. Solution-processability of the devices with superior optical properties of CNDs thus pave the way for future high-performance, low-cost DUV photodetectors.

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Novel thermal quenching characteristics of luminescent carbon nanodots via tailoring the surface chemical groups

Cited by 28 publications

References 32 publications

2D–Materials‐Based Quantum Dots: Gateway Towards Next‐Generation Optical Devices

2D–Materials‐Based Quantum Dots: Gateway Towards Next‐Generation Optical Devices

Interaction Promotes the Formation and Photothermal Conversion of Carbon Dots/Polydopamine Composite for Solar‐Driven Water Evaporation

Solution Processed Highly Responsive UV Photodetectors from Carbon Nanodot/Silicon Heterojunctions

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