Tuning of carbon dots emission color for sensing of Fe3+ ion and bioimaging applications

Hydrothermal Synthesis to Water-stable Luminescent Carbon Dots from Acerola Fruit for Photoluminescent Composites Preparation and its Application as Sensors

“…To further support about the optical properties of C-dots dispersed on PVA films, photoluminescence measures were also evaluated. Analogous to those previously reported [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] , the PL emission spectra for the C-dots/PVA-1 film ( Figure 8B) exhibited a typical excitation-dependent feature, where the emission peak red shifts to longer wavelengths with the increase in the excitation wavelength. Moreover, the maximum emission intensity of C-dots/PVA film was observed at 459 nm when excitation wavelength was 360 nm maybe due to the nature of C-dots surface and the maximum number of particles being excited at 360 nm.…”

“…The highest PL intensity of C-dots was observed at an excitation wavelength of 360 nm due to the largest number of particles being excited at that wavelength. Another reason for the excitation dependent PL behavior of C-dots is the nature of their surface [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] . The presence of various functional groups on the surface of the C-dots may result in a series of emissive traps between π -π* transitions of C-C. From the digital images presented in inset of Figure 1A, the diluted C-dots solution is tawny under ambient daylight but exhibits strong green photoluminescence emission under UV light (365 nm), which confirmed the good fluorescent property of C-dots produced via green method.…”

“…Several raw material including citric acid, coffee grounds, soy milk, fruits and egg have been used in the synthesis of C-dots. 2,4 However, it is still desirable to obtained luminescent C-dots by an easy and eco-friendly benign method with lowcost and readily available starting materials, such as using plant as raw materials 6,7,8,9 . In this sense, Jiang et al 10 produced fluorescent carbon nanoparticles derived from natural materials of mango fruit, by the controlled carbonization method, for bio-imaging probes.…”

Self‐Quenching‐Resistant Red Emissive Carbon Dots with High Stability for Warm White Light‐Emitting Diodes with a High Color Rendering Index

“…Carbon dots (CDs), an emerging class of carbon‐based luminescent nanomaterials, have attracted more and more attention and interest in recent years owing to their outstanding properties, such as chemical stability, [ 10,11 ] photostability, [ 12–14 ] biocompatibility, [ 15,16 ] and low toxicity. [ 17–19 ] Because of those distinct merits, CDs could be able to apply in extensive fields, such as drug delivery, [ 20,21 ] solar cell, [ 22 ] optoelectronic devices, [ 23,24 ] bioimaging, [ 25,26 ] and so on. Innumerable explorations in WLEDs filed are emerging repeatedly because of remarkable optical characteristic of CDs, such as strong UV absorption, tunable fluorescence emission, high thermal stability, and photostability.…”

Highly selective and sensitive detection of amaranth by using carbon dots-based nanosensor

“…C-dots, as emerging light-emitting nanomaterials, have drawn great attention because of their prominent characteristics such as facile synthesis, easy functionalization, favorable photoluminescence, good water solubility, high chemical and photo stability, excellent biocompatibility and low cytotoxicity. [27][28][29] These outstanding properties make C-dots a promising material and can be used in the elds of bioimaging, [30][31][32] energy conversion and storage, 33 biomedicine 34 and photocatalysis. 35 In addition, C-dots are also widely used to detect various analytes based on changes in uorescence intensity.…”