4.6 Article

From Small Molecules to Zero-Dimensional Carbon Nanodots: Chasing the Stepwise Transformations During Carbonization

Related references

Note: Only part of the references are listed.
Article Chemistry, Physical

Specific locations of blue and green-emitting units in dual emissive carbon dots and their reversible emitting properties due to switchable inter-chromophoric interactions

Rahul Bhuyan et al.

Summary: Carbon dots are a unique class of luminescent nanomaterials with intriguing multistate emissive properties. This study reveals the specific locations of blue and green-emitting centers inside dual emissive CDs, as well as the solvent-dependent interactions between the two emissive domains. The switchable inter-chromophoric interaction between blue and green emissive domains is correlated with the inter-particle interactions of CDs.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

Article Chemistry, Physical

Dual Fluorescence in Glutathione-Derived Carbon Dots Revisited

Yadolah Ganjkhanlou et al.

Summary: This study demonstrates the ability to obtain dual-fluorescence carbon dots through a solvothermal synthesis route, and reveals that the dual-fluorescence emission does not originate from a single carbon dot emitter, but rather a mixture of physically separate compounds. By characterizing the synthesis products, two different compounds were identified and a simple separation method was demonstrated. Understanding the nature of the system allows for steering the synthesis towards desired products.

JOURNAL OF PHYSICAL CHEMISTRY C (2022)

Article Chemistry, Physical

Large scale synthesis of full-color emissive carbon dots from a single carbon source by a solvent-free method

Hui Ding et al.

Summary: This work demonstrates a solvent-free large scale synthesis method for CDs with high QY, tunable PL emission, and production yield. The optical properties of the CDs can be modulated by controlling the deamination and dehydrogenation processes during reactions. Additionally, WLEDs with high CRI across the visible range are successfully fabricated by mixing the red, green, and blue emissive CDs into PVA matrix in appropriate ratios.

NANO RESEARCH (2022)

Article Chemistry, Physical

Molecular, Aromatic, and Amorphous Domains of N-Carbon Dots: Leading toward the Competitive Photoluminescence and Photocatalytic Properties

Kommula Bramhaiah et al.

Summary: In this study, different types of nitrogen-doped carbon dots (N-CDs) were developed by varying nitrogen-containing precursors, allowing for control over the internal structures affecting photophysical processes and photoluminescence properties. The research indicated that the photocatalytic efficiency is related to the presence of amorphous domains and nitrogen atoms positioned specifically, while photoluminescence intensity is correlated with the presence of molecular fluorophores and aromatic domains.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Chemistry, Physical

Insight into the Molecular Model in Carbon Dots through Experimental and Theoretical Analysis of Citrazinic Acid in Aqueous Solution

Antonio Cappai et al.

Summary: The molecular emission model is widely accepted for explaining the emission properties of carbon dots (CDs) in low-temperature synthesis. In the case of citric acid and urea, the formation of citrazinic acid (CZA) single monomers and oligomers is shown to influence the optical properties of CDs. Experimental and theoretical studies demonstrate the impact of weak bonding interactions on the UV absorption spectrum of molecular aggregates, particularly dimers, trimers, and tetramers of CZA.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Chemistry, Physical

Room-temperature phosphorescent fluorine-nitrogen co-doped carbon dots: Information encryption and anti-counterfeiting

Feng Liu et al.

Summary: The study found that fluorine-nitrogen co-doped carbon dots exhibit high RTP lifetime and quantum yield, mainly originating from specific electron transitions. Additionally, hydrogen bonding between carbon dots and polyvinyl alcohol matrix, as well as semi-ionic C-F bonds, can enhance the efficiency of RTP.

CARBON (2021)

Article Chemistry, Multidisciplinary

Insight into the Multistate Emissive N, P-doped Carbon Nano-Onions: Emerging Visible-Light Absorption for Photocatalysis

Subhajit Kar et al.

Summary: In this study, unique N, P-co-doped carbon nano onions (N, P-CNOs) with a self-assembled onion-like layered structure were fabricated using a bottom-up facile synthesis technique. These N, P-CNOs displayed enhanced visible light absorption and efficient visible-light-induced photocatalytic performance for MB dye degradation. The study concluded that the N, P-CNOs hold great potential for application in visible-light photocatalysis due to their easy synthesis, low cost, and unique morphology.

CHEMISTRY-AN ASIAN JOURNAL (2021)

Article Multidisciplinary Sciences

A rich gallery of carbon dots based photoluminescent suspensions and powders derived by citric acid/urea

Joanna D. Stachowska et al.

Summary: This study demonstrates the generation of a diverse range of fluorescent materials by using citric acid and urea as precursors, with the ability to fine-tune the chemical composition and optical properties by adjusting the molar ratio of the reactants. The approach leads to the formation of photoluminescent materials in liquid and solid state with different emissive signals arising from various sources within the materials.

SCIENTIFIC REPORTS (2021)

Article Chemistry, Physical

Single Li ion conducting solid-state polymer electrolytes based on carbon quantum dots for Li-metal batteries

Zeyu Li et al.

Summary: A novel Li+ conductor based on carbon quantum dots was successfully fabricated in this study, showing high ionic conductivity and excellent stability in Li-metal batteries, as well as the ability to withstand various deformations.

NANO ENERGY (2021)

Article Chemistry, Physical

Contribution of the Molecular Fluorophore IPCA to Excitation-Independent Photoluminescence of Carbon Dots

Michal Langer et al.

Summary: This study used a hybrid quantum mechanical/molecular mechanical method to investigate the origins of photoluminescence in carbon dots (CDs), revealing that molecular fluorophores (MFs) are the main source of broad emission in CDs. The environment and nature of embedding of MFs were found to significantly influence their photoluminescence intensity and excitation-emission Stokes shifts, with calculated signals being consistent with experimental observations.

JOURNAL OF PHYSICAL CHEMISTRY C (2021)

Article Chemistry, Physical

Citric Acid Based Carbon Dots with Amine Type Stabilizers: pH-Specific Luminescence and Quantum Yield Characteristics

Florian Meierhofer et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2020)

Article Chemistry, Physical

Toward Bright Red-Emissive Carbon Dots through Controlling Interaction among Surface Emission Centers

Evgeny Kundelev et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2020)

Article Chemistry, Multidisciplinary

sp2-sp3-Hybridized Atomic Domains Determine Optical Features of Carbon Dots

Nikita V. Tepliakov et al.

ACS NANO (2019)

Review Chemistry, Multidisciplinary

Evolution and Synthesis of Carbon Dots: From Carbon Dots to Carbonized Polymer Dots

Chunlei Xia et al.

ADVANCED SCIENCE (2019)

Article Chemistry, Physical

Insight into the hybrid luminescence showed by carbon dots and molecular fluorophores in solution

Ricardo M. S. Sendao et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2019)

Article Multidisciplinary Sciences

Structure and solvents effects on the optical properties of sugar-derived carbon nanodots

Nikolaos Papaioannou et al.

SCIENTIFIC REPORTS (2018)

Article Chemistry, Multidisciplinary

Sunlight-Induced Photocatalytic Degradation of Pollutant Dye by Highly Fluorescent Red-Emitting Mg-N-Embedded Carbon Dots

Anshu Bhati et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2018)

Article Chemistry, Multidisciplinary

Self-Protective Room-Temperature Phosphorescence of Fluorine and Nitrogen Codoped Carbon Dots

Peng Long et al.

ADVANCED FUNCTIONAL MATERIALS (2018)

Article Chemistry, Physical

Molecular Fluorescence in Citric Acid-Based Carbon Dots

Julian Schneider et al.

JOURNAL OF PHYSICAL CHEMISTRY C (2017)

Article Chemistry, Multidisciplinary

Tracking the Source of Carbon Dot Photoluminescence: Aromatic Domains versus Molecular Fluorophores

Florian Ehrat et al.

NANO LETTERS (2017)

Article Multidisciplinary Sciences

Effect of nitrogen atom positioning on the trade-off between emissive and photocatalytic properties of carbon dots

Santanu Bhattacharyya et al.

NATURE COMMUNICATIONS (2017)

Article Nanoscience & Nanotechnology

Carbon Dot Based, Naphthalimide Coupled FRET Pair for Highly Selective Ratiometric Detection of Thioredoxin Reductase and Cancer Screening

Jagpreet Singh Sidhu et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

Article Chemistry, Multidisciplinary

Beyond bottom-up carbon nanodots: Citric-acid derived organic molecules

Shoujun Zhu et al.

NANO TODAY (2016)

Article Chemistry, Multidisciplinary

Carbon Dots: A Unique Fluorescent Cocktail of Polycyclic Aromatic Hydrocarbons

Ming Fu et al.

NANO LETTERS (2015)

Article Chemistry, Multidisciplinary

Highly Photoluminescent Carbon Dots for Multicolor Patterning, Sensors, and Bioimaging

Shoujun Zhu et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2013)

Article Materials Science, Biomaterials

Carbon quantum dots for optical bioimaging

Pengju G. Luo et al.

JOURNAL OF MATERIALS CHEMISTRY B (2013)