Introduction to Carbon Dots

A facile, friendly and one-step hydrothermal protocol was used to synthesize nitrogen-doped carbon dots (N-CDs) by utilizing hexamethylenetetramine and ethanediamine as the carbon and nitrogen sources.

In this work, we employed one-step hydrothermal reaction to prepare bismuth sulfide (Bi2S3) incorporated with N-doped, red-light-emissive carbon dots (r-CDs) which manifest effective interface contact and excellent photocatalytic performance.

High quantum yield carbon dots and their applications in the detection of L-threonine.

By embedding high quantum yield blue-emitting carbon dots (CDs) into zeolitic imidazolate framework-8 (ZIF-8), the luminescent metal-organic frameworks (LMOFs) - [email protected] composites were fabricated facilely and served as the fluorescent probe for selective and sensitive detection of dopamine (DA).

N-doped carbon dots (N-CDs) were successfully synthesized via simple one-step hydrothermal carbonization using chitosan as carbon and nitrogen sources.

In this report, we optimized the fabrication conditions to obtain dual-emissive carbon dots (DECDs) using simple one-step synthesis.

Nitrogen doped carbon dots (N-CDs) have been prepared via a one-pot hydrothermal method by using formamide and o-phenylenediamine as the carbon precursors for Fe3+ and HPO42− detection.

Nitrogen and sulfur codoped carbon dots (NSCDs) were synthesized via a one-pot hydrothermal method, and citric acid, ethylenediamine, and methyl blue were used as precursors.

Solid-state carbon dots (CDs) are a new kind of color converting material for white light-emitting diodes (white LEDs) because of its good luminesce performance and low toxicity; however, CDs in solid state suffer from aggregation-caused quenching (ACQ); thus, solid-state CDs need to be dispersed into or encapsulated with matrix.

Because of their porous structure and good FL properties, P-Gd-MNs is an ideal material for white light-emitting diodes (WLEDs) with adjustable correlation color temperature, by embedding fluorescent carbon dots into their pores.

Nitrogen and sulfur co-doped carbon dots (abbreviated as N,S-CDs) were obtained by two-step hydrothermal reactions using citric acid/sulfamic acid as precursors, polyethyleneimine (PEI) as passivation agent.

In this study, excitation-dependent multiple emission nitrogen and sulfur co-doped carbon dots (NS-CDs) are synthesized using a one-pot hydrothermal method.

Herein, we report the unique dynamic ultralong room temperature phosphorescence (URTP) in flexible solid films made of luminescent carbon dots (CDs) and polyvinylpyrrolidone (PVP).

Herein, carbon dots (CDs) are in situ introduced into Eu-substituted AlPO4 -5 zeolite (named [email protected]) via a solvent-free thermal crystallization method, which exhibits triple emissions including pink fluorescence mainly associated with Eu3+ in the zeolite framework, blue fluorescence and green room temperature phosphorescence (RTP) associated with CDs.

To overcome these limitations, various types of drug delivery systems have been explored, and recently, carbon dots (CDs) materials have also garnered attention in the field of drug delivery.

Herein, a pH and redox dual-responsive drug delivery system (CDs–Pt(IV)–PEG) was developed based on fluorescence carbon dots (CDs).

Boron and nitrogen co-doped carbon dots (B, N-CDs) were fabricated through a simple, one-step hydrothermal reaction of citric acid, boric acid, and tris base.

In this work, an “on-off-on” fluorescent sensor of sulfur and nitrogen co-doped carbon dots (S, N-CDs) was explored for the identification of Cr (VI) and ascorbic acid (AA), which showed a good selectivity and anti-interfere ability to more than 30 interfering substances.

Among antibacterial nanomaterials, carbon dots (CDs) have attracted much attention because of their unique physical and chemical properties and good biosafety.

Carbon dots (CDs) have attracted much attention owing to their distinctive 0D chemical structure, ultra-small size, and intrinsic surface/edge defects, and have been widely used in many kinds of research fields.

In this work, S,N-codoped carbon dots (S,N-CDs)/graphitic carbon nitride (g-C3N4) nanosheet is synthesized by hydrothermal method as an efficient photocatalyst for the decomposition of H2S.

Herein, graphitic carbon nitride nanosheets (signified as CN-NS) were anchored with Ag3BiO3 and carbon dots (abbreviated as CDs) by hydrothermal procedure with appreciably promoted photoactivity towards elimination of several contaminants.

In this paper, we present a novel method based on fluorescence resonance energy transfer (FRET) between carbon dots and Ag nanoparticle for sensing various fibrillation stages of beta-amyloid proteins.

In this work, SERS enhancement is realized by plasmon coupling and fluorescence resonance energy transfer (FRET) processes concerning to fluorescent carbon dots (CDs) coupled with silver nanoparticles (Ag-NPs).

Using l -cysteine as the precursor, carbon dots with nitrogen and sulfur heteroatoms co-doped (N, S-CDs) were synthesized via a simple hydrothermal method.

Novel highly fluorescent carbon dots (CDs) were synthesized through a green, low-cost, and simple hydrothermal method from the chicken as a carbon source.

Metal-doped carbon dots (CDs) exhibited promising application in fluorescence and magnetic resonance (MR) imaging, but developing manganese-doped CDs (Mn-CDs) with long wavelength emission and enha.

Phosphorescent carbon dots (CDs) have great potential in energy, information, biomedicine, and other fields because of their long lifetime, long wavelength emission, and low background interference.

To promote the development of molecular imprinting technique in the separation and analysis of oxycodone, molecularly imprinted polymer based on the magnetic graphene oxide and carbon dots nanoparticles ([email protected]/CDs NPs) was developed using ultrasonic-assisted dispersive solid-phase microextraction (UA-DSPME) and high performance liquid chromatography (HPLC).

Among the materials used for described purposes, quantum (QDs) or carbon dots (CDs) layered by molecularly imprinted polymer (MIP) shells have gained widespread attention.

Aiming to understand and enhance the capacity of carbon dots (CDs) to transport through cell membranes and target subcellular organelles—in particular, mitochondria—a series of nitrogen-doped CDs were prepared by the one-step microwave-assisted pyrolysis of citric acid and ethylenediamine.

Here we report the development of fluorescent nitrogen- and zinc-doped carbon dots (N-Zn-doped CDs) using one-step microwave-aided pyrolysis based on citric acid, branched PEI25k, and different zinc salts.

An overview of carbon nanotubes, graphene and carbon dots-based substances, used for environmental treatment is given in this survey.

These materials include various semiconductor quantum dots, carbon nanotubes, graphene derivatives, carbon dots, nanodiamonds, luminescent metal nanoclusters, lanthanide-doped upconversion nanoparticles and downshifting nanoparticles, triplet-triplet annihilation nanoparticles, persistent-luminescence nanoparticles, conjugated polymer nanoparticles and semiconducting polymer dots, multi-nanoparticle assemblies, and doped and labeled nanoparticles, including but not limited to those based on polymers and silica.

A facile one-step hydrothermal strategy using citric acid, ethylenediamine, and fluorescein as the precursors for the synthesis of fluorescent nitrogen-doped carbon dots (NCDs).

Carbon dots (CDs) were obtained from medicinal turmeric leaves (Curcuma longa) by a facile one-step hydrothermal method and evaluated for their bactericidal activities against two gram-negative; Escherichia coli, Klebsiella pneumoniae, and two gram-positive counterparts; Staphylococcus aureus, S.

In recent years, the methods for rapidly detecting antibiotics using the unique fluorescent properties of carbon dots have attracted increasing attentions.

Carbon dots (CDs) have opened up a new field of carbon nanomaterials and successively attracted increasing attention since their discovery in 2004.

Recently, carbon dots (CDs) have attracted wide attention for their potential use as fluorescence probes in biological and analytical chemistry due to their great stability and high fluorescence quantum yields.

In this work, green fluorescent carbon dots (CDs) with a high fluorescence quantum yield (QY) of 36.

Herein, a ratiometric fluorescent probe (r-bCDs) for intracellular lysosomal polarity imaging is designed and constructed by amide bond assembly of polarity-sensitive red fluorescent carbon dots (rCDs) and referenced blue fluorescent carbon dots (bCDs).

In this work, we use water-soluble and fluorescent cationic carbon dots cetylpyridinium chloride monohydrate (CPC)-CQDs to connect with pinacyanol chloride (PC) and sodium tetraphenylborate (ST) as the ratiometric fluorescent probe to detect BH.

This sensor was fabricated with the modification of a glassy carbon electrode using multiwall carbon nanotubes (MWCNTs) and mesoporous silica (SBA-15) that was modified with silane functionalized carbon dots (Si-CDs).

In this work, N-doped carbon dots (NCDs) incorporated into magnetic NiFe2O4/CoFe2O4 nanoparticle shell (NiFe2O4/CoFe2O4/NCDs) modified glassy carbon electrode (GCE) was applied to construct a dual-template molecularly imprinted polymer (MIP) based electrochemistry sensor (NiFe2O4/CoFe2O4/NCDs/MIP/GCE) for the simultaneous detection of catechin (CA) and theophylline (TPH).

We report a ratiometric fluorescence sensor formed via the self-assembly of the lanthanide ion Eu3+ and blue-emitting carbon dots (CDs) for the direct detection of ascorbic acid (AA).

In this work, a facile ratiometric fluorescence sensor for GSH measurement was designed based on MnO2 nanosheet (NS), carbon dots (CDs), as well as a simple substrate o-phenylenediamine (OPD).

The fluorescence assay was constructed by the adsorption of cationic carbon dots and positively charged naphthalimide on negatively charged hyaluronic acid and the development of a Förster resonance energy transfer (FRET) mechanism from carbon dots to a naphthalimide fluorophores.

In this work, the Förster resonance energy transfer (FRET) between carbon dots (CDs) as energy donors and riboflavin (RF) as an energy acceptor was optimized and the main parameters that characterize the FRET process were determined.

Herein, carbon dots with near-infrared fluorescence (NIR-CDs) were prepared by the facile hydrothermal method.

The carbon nanoparticles are considered an immerging nanomaterial for biomedical applications because of near-infrared fluorescence carbon dots (NIR CDs) activity, low-toxicity, abundance, biocompatibility, and excellent photostability.

In this study, a novel and sustainable approach was used to synthesize nitrogen-doped carbon dots (NCDs) from the waste biomass of Poa Pratensis (Kentucky bluegrass (KB)) by a facile hydrothermal method.

In this paper, an effective two-step solvothermal route is demonstrated to synthesize nitrogen-doped carbon dots (NCDs) decorated cobalt-doped nickel sulfide (Co-NiS) flower-like hierarchitectures.

Heteroatoms doped carbon dots (CDs) have attracted extensive attention for their superior optical properties, facile preparation and multifunctional applications in environmental detection, cell imaging and gene delivery.

Carbon dots (CDs), a new type of carbon material, have attracted extensive attention due to their fascinating properties, such as small particle size, tunable optical properties, good conductivity, low cytotoxicity, and good biocompatibility.

A novel photocatalyst was developed by combining TiO2 (P25), reduced graphene oxide (rGO), and [email protected] clustered carbon dots (CDs) by one-step hydrothermal method for the high efficiency visible-light degradation of organic dyes and antibacterial application.

Herein, carbon dots modified reduced graphene oxides (LAP-rGO-CDs) are designed and synthesized via a rapid and green microwave-assisted method with l -Ascorbic acid 6-palmitate (LAP) as the reducing agent.

Herein, a novel ratiometric fluorescence (PL) sensor based on the red-emitting CdTeS quantum dots (QDs) and blue-emitting polyethyleneimine-functionalized carbon dots (PEI-CDs) was firstly designed for sensing Cu2+.

A novel ratiometric fluorescence nanoprobe based on carbon dots (CDs) and Cu nanoclusters (CuNCs) was designed for the label-free determination of uric acid (UA).

We synthesized carbon dots having emission wavelengths in the near-infrared region from spinach extract.

The absence of an ideal solid matrix with resistance to harsh conditions for carbon dots (CDs) and high transmittance in the visible/near infrared region is the bottleneck in CD applications.

It was fabricated by encapsulating polyethylene glycol (PEG) and aggregation-induced emission carbon dots (AIE-CDs) showing blue dispersed emission and red aggregation-induced emission into delignified wood (DW).

Keeping these points in mind, this review attempts to give a perspective on the four key fluorescent materials of different families, including carbon dots, metal nanoclusters, aggregation-induced-emission luminogens, and MXenes, which possess great potential for the development of ultrasensitive biosensors and infective antimicrobial agents to fight against various infections/diseases.

Hierarchical hollow Mg-Al layered double hydroxide microspheres (HHMs) are successfully prepared by hydrothermal treatment in the presence of carbon dots (CDs).

Here we report a new strategy, electric field polarization to regulate the charged functional groups of nickel-iron layered double hydroxide (NiFe LDH)/carbon dots (CDs) composite catalysts.

As an emerging fluorescent nanomaterial, carbon dots (CDs) exhibit many attractive physicochemical features, including excellent photoluminescence properties, good biocompatibility, low toxicity and the ability to maintain the unique properties of the raw material.

Carbon dots (CDs) possess outstanding features such as useful optical properties, good biocompatibility, and the ability for easy surface modification.

We report a facile, one-pot hydrothermal synthesis of surface passivated, nitrogen doped carbon dots (N-CDs) from jackfruit peel and tamarind peel precursors.

In this work, a facile one-pot hydrothermal route was employed to synthesize a series of fluorescent carbon dots (CDs) by using 20 natural amino acids, respectively, as the starting materials.

The B,N dual-doped carbon dots (B,N-CDs) for ratiometric fluorescence detection the morin were prepared from sodium tetraborate and polyethyleneimine through the single-step hydrothermal method.

In this strategy, carbon dots (CDs), MnO2 nanosheets, and tetraphenylporphyrin tetrasulfonic acid (TPPS) comprise a ternary system for ratiometric fluorescence detection of AA.

Carbon dots (CDs)-based biosensors have attracted considerable interest in reliable and sensitive detection of microRNA (miRNA) because of their merits of ultra-small size, excellent biosafety and tunable emission, whereas complicated labeling procedure and expensive bioenzyme associated with current strategies significantly limit their practical application.

Fluorescent carbon dots (CDs) have attracted considerable interest due to their superior optical properties and facile preparation.

Highly fluorescent nitrogen-doped carbon dots (CDs) were synthesized from cambuci juice (Campomanesia phaea (O.

Stable blue fluorescent nitrogen doped carbon dots (N-CDs) with a very high quantum yield up to 81% has been reported for the first time.

In this work, nitrogen-doped carbon dots (N-CDs) were prepared via one-step hydrothermal conversion of nitrogen-rich adenine and ethylenediamine.

In this work, nitrogen-doped carbon dots (N-CDs) based fluorescent probes were synthesized using m-phenylenediamine and citric acid as both nitrogen and carbon source through the hydrothermal method.

Interestingly, the exogenous fluorescence signal source of carbon dots can be quenched by DAP via inner filter effect, while a new emission peak at 563 nm can be discovered, forming a ratiometric fluorescence signal.

This work describes a novel fluorescent chemoprobe that uses carbon dots and silver nanoparticles (AgNPs) to monitor mercury ions in aqueous samples attributed to the principle of inner filter effect.

A dual-emitting ratiometric fluorescence nanosensor based on novel molecularly imprinted polymers (MIPs), which possesses self-referencing ability by nitrobenzoxadiazole (NBD) as recognition signal and new carbon dots (CDs) as interior label, has been prepared for sensitive and visual detection of okadaic acid (OA) in seawater and sediment samples.

In this study, we developed a ratiometric fluorescence nanosensor combined with carbon dots (CDs)-doped mesoporous silica and fluorescein-based fluorescent probes loaded in pores for Cys detection.

This paper presents an environmentally benign and facile method for synthesizing concentration-dependent multicolor fluorescent carbon dots using greengage plums and a single-step hydrothermal method.

Herein, nitrogen, phosphorous, and sulfur codoped carbon dots (NPSC-dots) have been synthesized by a single-step hydrothermal strategy.

Herein, a pH-triggered fluorescence-switchable extracellular vesicle as a smart nanocarrier is fabricated by loading zwitterionic fluorescent carbon dots (CDs) into macrophage cell-secreted vesicles to achieve improved drug delivery and real-time monitoring of drug release.

Herein, we developed one kind of red emissive two-photon carbon dots (TP-CDs) via an N doping strategy for nucleolus-targeted treatment combined with real-time monitoring of dynamic changes in the nucleolus.

In our study, we have tested the effects of sonication and hydrothermal treatments on the properties of carbon dots synthesized from a microwave-assisted method (C-dotsMW).

A silver nanoparticles/nitrogen-doped carbon dots (AgNPs/NCDs) nanocomposite was prepared by a microwave-assisted method, and exhibited high catalytic activity towards the reduction of rhodamine B, methyl red and 4-nitrophenol at ambient temperature.

Here we prepare red-emissive carbon dots (CDs) with a photoluminescence quantum yield (PLQY) of 65.

Carbon dots (CDs) are metal-free fluorescent materials that can be used in optical and electronic devices, but few studies have focused on one-step synthesis routes for CDs with tunable color and high photoluminescence quantum yield (PLQY).

In this work, the red emission multifunctional carbon dots (R-CDs) were prepared via one-pot hydrothermal strategy of neutral red (NR) and ethylenediamine (EDA) for the label-free detection of berberine and curcumin, cell imaging, and fluorescent flexible film.

A strategy, based on introducing steric hindrance, has been designed to prepare biomass-based solid-state fluorescent carbon dots (SSF-CDs) with high yield (~100%) via one-pot hydrothermal reaction of dehydroabietic acid and ethanolamine.

Carbon dots (CDs) were preparedby classic critic acid and thiourea as precursors, modulating the volume ratio of solvent that is water and DMF under one-pot solvothermal reaction to prepared colortunable CDs with emissive wavelength from 450 nm to 640 nm.

In this work, blue emission carbon dots (CDs) are synthesized in the one-pot solvothermal method using naringin as precursor.

Here, a facile hydrothermal method was used to synthesize highly photoluminescent N-doped carbon dots, and the quantum yields reached 97.

Herein, green-emitting nitrogen-doped carbon dots (CDs) were prepared by one-step solvothermal method.

Carbon dots (CDs) have attracted increasing research interest due to its ultra-small size, excellent optical properties and low toxicity, etc.

Herein, by doping carbon dots (CDots) and gold nanoparticles (AuNPs) into zeolitic imidazolate framework (ZIF-8), novel high-efficiency ECL emitters [email protected]/AuNPs nanocomposites were prepared.