Abstract Green luminescent, graphene quantum dots (GQDs) with a uniform size of 3, 5, and 8.2(±0.3) nm in diameter were prepared electrochemically from MWCNTs propylene carbonate by using LiClO 4 at 90 °C, whereas similar particles 23(±2) obtained 30 °C under identical conditions. Both these sets GQDs displayed remarkable efficiency 6.3 5.1 %, respectively. This method offers novel strategy to synthesise size‐tunable as evidenced multiple characterisation techniques like transmission...

Quantum dots of single-/few-layered MoS₂ with tunable sizes, obtained through a unique electrochemical exfoliation process, show excellent electrocatalytic activity towards hydrogen evolution reactions.

This review covers recent advancements in the synthesis of graphene quantum dots (GQDs) and their properties. It highlights GQDs' applications bioimaging for tumor visualization MRI, as well various biosensing technologies.

We demonstrate a simple one-step process for the synthesis of water-dispersed spherical gold nanoparticles using multifunctional molecule oleyl amine (OLA) that electrostatically complexes with aqueous chloroaurate ions, reduces them, and subsequently caps thus formed. The particles formed were fcc phase fairly monodisperse particular concentrations capping molecules.

We report a one-step route for the synthesis of Au@TiO2, Au@ZrO2, Ag@TiO2, and Ag@ZrO2 particles in nanometer dimensions, with controllable shell thickness. This scalable procedure leads to stable freely dispersible particles, bulk nanocomposite materials have been made this way. The various morphologies, crystalline core size range 30−60 nm diameter an amorphous ∼3 thickness typical synthesis. (in 1−10 nm) can be varied, leading different absorption maxima. material has characterized...

Fuel efficiency: Enhanced proton conductivity is obtained by the incorporation of single-walled carbon nanotubes prefunctionalized with sulfonic acid groups (S-SWCNTs) into a Nafion matrix (see scheme). The content CNT connects hydrophobic regions membrane, thus providing network for mobility. polymer electrolyte membranes also have improved mechanical stability in H2/O2 fuel cells. Supporting information this article available on WWW under...

Here we report a remarkable transformation of carbon nanotubes (CNTs) to nanoribbons composed few layers graphene by two-step electrochemical approach. This consists the oxidation CNTs at controlled potential, followed reduction form (GNRs) having smooth edges and fewer defects, as evidenced multiple characterization techniques, including Raman spectroscopy, atomic force microscopy, transmission electron microscopy. type "unzipping" (single-walled, multi-walled) in presence an interfacial...

Creating hybrid nanostructures consisting of disparate nanoscale blocks is interest for exploring new types quantum device architectures. Here, we demonstrate the novel anchoring monolayer-protected gold nanoclusters 1−3 nm diameter to sidewalls carbon nanotubes (CNTs) via hydrophobic interactions between octanethiols capping and acetone-activated CNT surfaces. Such molecularly interlinked nanoblocks are attractive building biocompatible nanodevices.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Characterization, and Properties of Microemulsion-Mediated Nanophase TiO2 ParticlesV. Chhabra, V. Pillai, B. K. Mishra, A. Morrone, D. O. ShahCite this: Langmuir 1995, 11, 9, 3307–3311Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://pubs.acs.org/doi/10.1021/la00009a007https://doi.org/10.1021/la00009a007research-articleACS PublicationsRequest reuse...

Since many metallic nanostructures with different shapes exhibit unique chemical and physical properties, a systematic attempt to synthesize these shape-controlled structures for property–shape correlation remains an important challenge in contemporary materials chemistry. Main difficulties like poor shape selectivity, low yield, presence of impurity phases, difficulty separation, etc., are exacerbated since have high surface energies which favour lower areas, consequently synthesis...

A schematic representation of the ultrafast synthetic method for preparing highly luminescent N, F and S co-doped graphene quantum dots from MWCNTs.

A 50% enhancement in the conversion efficiency (4.9−7.37%) is realized dye-sensitized solar cells using hydrothermally synthesized TiO2−multiwalled carbon nanotube (MWCNT) nanocomposites as compared to TiO2 without MWCNT and Degussa P25. Several characterizations have been employed reveal nature of modification imparted MWCNTs under hydrothermal processing conditions resulting TiO2−MWCNT conjugation through −COOH groups. Efficient charge transfer nanocomposite efficient electron transport by...

Luminescent graphene quantum dots (GQDs) are encapsulated and stabilized in Zeolitic Imidazolate Framework (ZIF-8) nanocrystals. The GQDs well confined due to the adsorption on growing face of ZIF-8 nanocrystals have a profound effect shape from rhombic dodecahedron spherical. Stabilizing inside results tailoring photoluminescence emission (ca. 32 nm, bathochromic shift) GQD@ZIF-8 nanocrystal composite even after 3 months aging under normal laboratory conditions. Also water (at STP) capacity...

Despite the promising photophysical properties of fluorescent graphene quantum dots (GQDs), their cellular toxicity needs to be addressed before full potential could completely realized in biomedicine. A simple method for mitigating GQDs by embedding them PEG matrix is reported here. The enhanced biocompatibility polymer modified, P-GQDs, attributed reduced reactive oxygen species generation, as measured an intracellular ROS assay. We also demonstrate loading and efficient delivery...

Carbon nanotubes (CNTs) have been employed as electrode materials in rechargeable zinc bromine redox flow batteries (ZBB) owing to their high electrocatalytic activity, remarkable electrical conductivity, and excellent mechanical strength with Young's modulus. The effect of single-walled carbon nanotube (SWCNT) multiwalled (MWCNT) electrodes for the 2Br–/Br2 couple has investigated battery application. anodic peak current density SWCNT is found be about 16 mA cm–2, which almost 50% higher...

A simple method of vapor deposition for the shape selective synthesis ZnO structures, namely, multipods, submicron wires, and spheres, has been successfully demonstrated. plausible growth mechanism based on studies scanning electron microscopy (SEM), transmission (TEM), X-ray diffraction (XRD), photoelectron spectroscopy (XPS) is proposed. Our suggest that a multipod structure governed by screw dislocation propagation while vapor−liquid−solid (VLS) responsible formation wires spheres....

Superhydrophobic multiwalled carbon nanotube bucky paper, fabricated after ozonolysis, shows fascinating electrowetting behavior, which could be remarkably tuned by changing key solution variables like the ionic strength, nature of electrolyte, and pH water droplet. More significantly, droplet behavior can reversibly switched between superhydrophobic, Cassie-Baxter state to hydrophilic, Wenzel application an electric field, especially below a threshold value.