Themed collection Quantum and carbon dots

Schemetic diagram of the mechanism of GQD-induced cytotoxicity.

Nanoparticles possess fascinating properties and applications, and there has been increasing critical consideration of their use.

The recent advances in sustainable optoelectronics applications of quantum dots derived from different biomolecules are documented in this review.

The picomolar level detection of vitamin B12 using orange-emitting Mn²⁺-doped ZnS quantum dots is described herein.

Temperature and precursor-controlled in situ generated, oleylammonium halide species from molecular bromine and amine plays decisive role in the synthesis of long-term ambient stable and emission tunable CsPbBr₃ perovskite nanocrystals.

Effective theranostic probes in cancer therapy are still a challenge. We report the selective killing of cancer cells upon photothermal ablation using a new class of 2,5-deoxyfructosazine-coated green-emissive carbon dots using mild LED-irradiation.

The TCSPC analysis revealed that DDT-PQDs mainly performed single radiative decay, whereas PQDs showed additional slow nonradiative decay with rise of temperature.

Effect of mineral nutrients in biomass was found to be crucial in the synthesized carbon dots, affecting their dispersibility, PL stability and crystallinity.

The present study addresses the limitation of versatility in green precursors by exploring the formation of carbon dots with respect to the contents of green precursor, i.e. Rosa indica. The synthesis mechanism is elucidated by analysing the precursors and intermediates at different intervals.

Semiconductor quantum dots showing controlled circularly polarized luminescence were achieved through co-assembling with chiral peptide dendron gelator in water.

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.

Carbon nanodots were chemically modified to control the fluorescence and identify fluorophores.

The embedding of MoS₂ quantum dots in polyvinyl alcohol matrices produces long afterglow phosphorescent materials.

Visible light sensitive stimuli responsive fluorescent carbon dots have been fabricated and utilized for metal free hydrogen evolution from water.

Carbon dots prepared from tyrosine and citric acid inhibit fibrillation, membrane interactions and toxicity of hIAPP.

The smallest-pore SAPO-20 zeolite confined pyrolysis of organics afforded ultrasmall uniform carbon dots with excellent performance in bioimaging.

This study explores chemical changes that occur to five carbon nanodots upon exposure to oxidants, and relates these to changes of their optical properties.

We report control of the emission efficiency of core QDs in MoS₂–QD hetero-structure. At smaller separations we observe enhanced emission from QDs on MoS₂ as compared to the reference despite the presence of significant non-radiative processes.

Using a novel hydrothermal synthesis, nitrogen-doped carbon dots were synthesized and shown to exhibit tunable optical and electrochemical properties.

The performance of organic solar cells was improved by the effect of a synergistic gold quantum dot/plasmonic grating system.

Two ionized carbon dots were prepared with different optical properties and applied for the selective detection of Fe²⁺ and Cu²⁺.

Enhanced forward osmosis desalination and dye rejection achieved via a unique thin-film composite membrane designed using polyamide–GQD framework on hierarchically arranged porous membrane derived from de-mixed blends of PVDF/PMMA.

Green emitting QLEDs based on multiscale grid/wrinkle outcoupling nanostructures yield a maximum EQE of 21.3% and current efficiency of 88.3 cd A⁻¹, which are 1.7 times those of the standard device.

A novel carbon source self-heating strategy for ultrafast, energy-efficient and scalable synthesis of highly PL N, S-codoped CDs was established and used for sensing Fe³⁺ in an ultra-wide range of 0.2–600 μM, with a detection limit of 0.10 μM.

Broadband ultraviolet solid-state light emitter has been demonstrated based on the combined structure of MOCVD grown microstructure and the MBE grown quantum dots, thanks to the strain inhomogeneity of the multi-facet semiconductor microstructure.

The design and engineering of graphene-based nanomaterials for antimicrobial applications is attracting extensive interest. Here, we highlight the differential toxicity and phototoxicity of graphene oxide quantum dots after NaBH₄ reduction.

Multilayer Cu₂S/ITO/CuZnMo films are designed as CEs for QDSCs, having the merits of enhanced conductivity and stability, and high catalytic activity.

A fluorometric sensing system using LSPR phenomenon between fluorescent quantum dots and its adjacent AuNP to detect four closely related but serologically distinct dengue viruses (DENVs).

A NIR dye-coated silver nanoparticle/carbon dot nano-composite (CyOH–AgNP/CD) was synthetized as a novel nanophotosensitizer for targeted tumor imaging and high-efficiency PDT. The CyOH–AgNP/CD exhibit potential for future clinical imaging-guided PDT.

We demonstrate epitaxial nucleation of QDs onto titania by the successive ionic layer adsorption and reaction (SILAR) method at room temperature.

A new additive BYK-P105 was blended with PEDOT:PSS as the HTL to improve the device performance of QLEDs.

ZnO nanorod (NR) based inorganic quantum dot sensitized solar cells have gained tremendous attention for use in next generation solar cells.

A carbon-quantum-dot based laminated luminescent solar concentrator exhibits an η_opt of 1.6%, 1.6 times higher than that of a single-layer LSC.

Colloidal PbS quantum dots (QDs) have been successfully employed as additives in halide perovskite solar cells (PSCs) acting as nucleation centers in the perovskite crystallization process.

A feasible strategy to prepare quantum dot-incorporated carbon nanofibers as free-standing platforms and their possible application to photocatalysts.

Probing the interactions of ligands at the surface of colloidal quantum dots by NMR measurements of diffusion coefficients and spectral line widths.

Nanometer-sized luminescent semiconductor quantum dots (QDs) have been utilized as imaging and therapeutic agents in a variety of disease settings, including diseases of the central nervous system.

3D printed woodpile photonic crystals functionalized with CdS quantum dots are tuned for visible applications.

Simple, versatile, and cost-effective carbon dots are reported for initiating interfacial bonding in waterborne epoxy resin anti-corrosive coatings.

Semi-conductor quantum dots (QDs) are favorite candidates for many applications especially for potential use as optical bioimaging agents.

We present a facile room temperature synthesis of CH₃NH₃Pb_1−xMn_xI₃ perovskite quantum dots (PQDs) substituting manganese (Mn²⁺) at the lead (Pb²⁺) sites to minimize environmental pollution and make it commercially feasible.

A simple, eco-friendly, and low-cost electrochemical approach has been applied to the synthesis of carbon dots from histidine hydrochloride in the absence or presence of halides at various potentials up to 10 V.

We report a new way to engineer nanomaterials from biomolecules (N-dots) with bright fluorescence and high singlet oxygen generation towards theranostic applications.

We report an ultra-sensitive temperature sensor derived from graphene quantum dots (GQDs) embedded in a self-standing reduced graphene oxide (RGO) film.

In view of the easy control and contactless spatial nature of light, the photoreversible color switching system has attracted tremendous attention.

In order to translate molecular properties in molecular-electronic devices, it is necessary to create design principles that can be used to achieve better structure–function control oriented toward device fabrication.

Temperature-controlled, scalable synthesis of CA-based full-color CDs and subsequent fabrication of white-LEDs with CIE coordinates of (0.32, 0.33) and a CRI of 82.7.

Herein, we demonstrate for the first time matrix-free deposition of two dimensional (2D) MoS₂ nanosheets as an efficient hole transport layer (HTL) for colloidal lead sulfide (PbS) quantum dot (QD) solar cells.

The performance of organic solar cells was improved by the effect of a synergistic gold quantum dot/plasmonic gold nanoparticle system.

Glucose assay is highly important in clinical diagnostics of diabetes.

A simple and hybrid white-light optoelectronic device with a single excitation source with efficient RGB colours on a stable optical platform was demonstrated.

Fluorescent nitrogen doped carbon dots show parallel detection of Hg²⁺ and Cu²⁺ ions in both aqueous medium and on microfluidic device.

A self-referencing dual fluorescing carbon dot-based nanothermometer can ratiometrically sense thermal events in HeLa cells with very high sensitivity.