78 Results Found

Although, quantum dots (QDs) of two-dimensional (2D) molybdenum disulfide (MoS₂) have shown great potential for various applications, such as sensing, catalysis, energy storage, and electronics. However, the lack of a simple, scalable, and inexpensiv...

The interface of perovskite solar cells (PSCs) determines their power conversion efficiency (PCE). Here, the buried bottom surface of a perovskite film is efficiently passivated by using MoS₂ quantum dots. The perovskite films prepared on top of MoS₂...

The magnetic and electronic properties of zigzag-triangular WS₂ and MoS₂ quantum dots are investigated using density functional theory calculations. The pristine WS₂ and MoS₂ nanodots hold permanent spin on their edges which originates from the unpai...

The electronic and catalytic properties of two-dimensional MoS₂, WS₂, and NbS₂ quantum dots are investigated using density functional theory investigations. The stability of the considered structures is confirmed by the positive binding energies and...

Uniform water-soluble MoS₂ quantum dots (WS-MSQDs) were synthesized via a sequential combination of sintering/etching/exfoliation method and solvothermal route. The obtained WS-MSQDs with average size of approximately 3.4 nm exhibited sufficient wate...

Here, nitrogen doped molybdenum disulfide quantum dots (N-MoS₂ QDs) are fabricated by making use of the pulsed laser ablation (PLA) process in liquid nitrogen (LN₂) as a dopant agent. In fact, LN₂ contributes the rapid condensation of the plasma plum...

In this work, we report a facile method using MoS₂ quantum dots (QDs) as reducers to directly react with HAuCl₄ for the synthesis of Au nanoparticle@MoS₂ quantum dots (Au NP@MoS₂ QDs) core@shell nanocomposites with an ultrathin shell of ca. 1 nm. The...

This study presents three-dimensional (3D) MoS₂/reduced graphene oxide (rGO)/graphene quantum dots (GQDs) hybrids with improved gas sensing performance for NO₂ sensors. GQDs were introduced to prevent the agglomeration of nanosheets during mixing of...

MoS₂ quantum dots (QDs) were synthesized using a one-step hydrothermal method and subsequently functionalized with 11-mercaptoundecanoic acid. The functionalized QDs were thoroughly characterized, which exhibited antibacterial activity against Staphy...

Lead ions in water are harmful to human health and ecosystems because of their high toxicity and nondegradability. It is important to explore effective fluorescence probes for Pb²⁺ detection. In this work, surface-functionalized molybdenum disulfide...

The present preparation methods of molybdenum dioxide (MoO₂) quantum dots (QDs) are often cumbersome and not environmentally friendly, and more importantly, the prepared MoO₂ QDs are usually wrapped in surfactants, which are difficult to be removed a...

Two-dimensional transition metal dichalcogenides (TMDs) have attracted attention from researchers in recent years. Monolayer molybdenum disulfide (MoS₂) is the direct band gap two-dimensional crystal with excellent physical and electrical properties....

Molybdenum disulfide quantum dots (MoS₂ QDs) are a promising lubricant additive for enhanced engine efficiency. In this study, MoS₂ QDs were used as lubricating oil additives for ball-on-disc contact and had adequate dispersity in paroline oil, due t...

The design of photoactive materials and interface engineering between organic/inorganic layers play a critical role in achieving enhanced performance in energy-harvesting devices. Two-dimensional transitional dichalcogenides (TMDs) with excellent opt...

The microflower-like Si/MoS₂ composites were fabricated using Si quantum dots (QDs) to assist a facile hydrothermal method. The electrochemical performance of Si/MoS₂ composite in symmetric and asymmetric systems was studied. Electrochemical characte...

When the size of the molybdenum disulfide (MoS₂) is reduced to a few nanometers, a distinctive photoluminescence is observed due to the strong effect of quantum confinement. In this study, we fabricated MoS₂ quantum dots (QDs) using a simple and gree...

MoS₂ quantum dots (QDs) functionalized g-C₃N₄ nanosheets (MoS₂@CNNS) were prepared through a protonation-assisted ion exchange method, which were developed as a highly efficient biomimetic catalyst. Structural analysis revealed that uniformly-dispers...

Monolayer MoS₂ has been widely researched in high performance phototransistors for its high carrier mobility and strong photoelectric conversion ability. However, some defects in MoS₂, such as vacancies or impurities, provide more possibilities for c...

In the last 20 years, silicon quantum dots have received considerable attention from academic and industrial communities for research on readout, manipulation, storage, near-neighbor and long-range coupling of spin qubits. In this paper, we introduce...

Two-dimensional MoTe₂ is applicable for near-infrared photodetection; however, low absorption in the visible range limits its performance. One way to overcome these limitations is by hybridizing with light-absorbing nanomaterials. In this study, we s...

Fluorescence properties of quantum dots (QDs) are critically affected by their redox states, which is important for practical applications. In this study, we investigated the optical properties of MoSe₂-metallic phase quantum-dots (MoSe₂-mQDs) depend...

As nano-scale metal-oxide-semiconductor devices are cooled to temperatures below 1 K, detrimental effects due to unintentional dots become apparent. The reproducibility of the location of these unintentional dots suggests that there are other mechani...

Non-radiative energy transfer (NRET) from quantum dots (QDs) to monolayer MoS₂ has been shown to greatly enhance the photoresponsivity of the MoS₂ photodetector, lifting the limitations imposed by monolayer absorption thickness. Studies were often pe...

Photoelectrochromic devices, which combine light-induced color change with energy-efficient optical modulation, have attracted significant attention for applications such as smart windows, displays, and optical sensors. However, achieving high optica...

The development of an effective sensor system that can detect carcinogenic hydrazine is of prime scientific interest for the protection of human health and the environment. In the present study, MoS₂ quantum dots (QDs) with an average diameter of ~5...

This paper presents a study that aims to enhance the performance of quantum dot light-emitting didoes (QLEDs) by employing a solution-processed molybdenum oxide (MoO_x) nanoparticle (NP) as a hole injection layer (HIL). The study investigates the impa...

The electrolysis of water for hydrogen production is currently receiving significant attention due to its advantageous features such as non-toxicity, safety, and environmental friendliness. This is especially crucial considering the urgent need for c...

Graphene quantum dots (GQDs) possess the photosensitive absorption for photoelectrochemical hydrogen evolution owing to special band structures, whereas they usually confront with photo-corrosion or undesired charge recombination during photoelectroc...

Fabrication of high-performance, flexible quantum-dot light-emitting diodes (QLEDs) requires the reliable manufacture of a flexible transparent electrode to replace the conventional brittle indium tin oxide (ITO) transparent electrode, along with fle...

Graphene quantum dots (GOQDs)-MoS_x nanohybrids with different MoS_x stoichiometries (x = 2 and 3) were prepared in order to investigate their chemical stability under hydrogen evolution reaction (HER) conditions. Combined photoemission/electrochemical...

A fluorescent sandwich assay was devised to quantify CK-MB. In a typical immunoassay, antibodies bind to the target, and the detected signal is quantified according to the target’s concentration. We innovated a unique fluorescence assay known a...

We report the facile and economic preparation of two-dimensional (2D) and 0D MoSe₂ nanostructures based on systematic and non-toxic top-down strategies. We demonstrate the intrinsic peroxidase-like activity of these MoSe₂ nanostructures. The catalyti...

Rapid and accurate diagnosis of various biomarkers associated with medical conditions including early detection of viruses and bacteria with highly sensitive biosensors is currently a research priority. Aptamer is a chemically derived recognition mol...

In this paper, a molybdenum disulfide fluorescent probe with an Fe³⁺ fluorescent system was first synthesized by the hydrothermal method for the detection of iron ion concentration in oral solution of protein succinate. It was characterized by infrar...

In this study, we investigated the combined effects of MoS₂ QDs’ catalytic properties and the colorimetric responses of organic reagents to create a sniffing device based on the sensor array concept of the mammalian olfactory system. The aim wa...

We study the interaction of a quantum dot in the Voigt configuration with a laser pulse and particularly analyze the potential for rapid spin initialization by putting the quantum dot near a molybdenum disulfide (MoS ${}_2$ ) monolayer. The MoS ${}_{}$...

Molybdenum disulfide quantum dots (MoS₂ QDs) are a unique class of zero-dimensional (0D) van der Waals nanostructures. MoS₂ QDs have attracted significant attention due to their unique optical, electronic, chemical, and biological properties due to t...

In this review, we examine recent progress using boron nitride (BN) and molybdenum disulfide (MoS₂) nanostructures for electronic, energy, biomedical, and environmental applications. The scope of coverage includes zero-, one-, and two-dimensional nan...

Transition metal dichalcogenide-based quantum dots are promising materials for applications in diverse fields, such as sensors, electronics, catalysis, and biomedicine, because of their outstanding physicochemical properties. In this study, we propos...

In this study, we report on the application of a dielectric/ultra-thin metal/dielectric (DMD) multilayer consisting of ytterbium (Yb)-doped molybdenum oxide (MoO₃)/silver (Ag)/MoO₃ stacked as the transparent cathode in top-emitting green quantum dot...

A convenient bipolar-electrode (BPE) electrochemical method was engineered to produce molybdenum disulfide (MoS₂) quantum dots (QDs) using pure phosphate buffer (PBS) as the electrolyte and the MoS₂ powder as the precursor. Meanwhile, the correspondi...

In this work, ammonia cross-linked 8-armed polyethylene glycol hydrogel material was successfully synthesized and used as a template for synthesizing nanoparticles with fluorescent properties. The 8-armed polyethylene glycol hydrogel template was use...

Photodetectors based on transition metal dichalcogenides (TMDs) have been widely reported in the literature and molybdenum disulfide (MoS₂) has been the most extensively explored for photodetection applications. The properties of MoS₂, such as direct...

Energy generation and storage are critical challenges for developing economies due to rising populations and limited access to clean energy resources. Fossil fuels, commonly used for energy production, are costly and contribute to environmental pollu...

The cost-effective exfoliation of layered materials such as transition metal dichalcogenides into mono- or few- layers is of significant interest for various applications. This paper reports the preparation of few-layered MoS₂ from natural SiO₂-conta...

MoS₂ quantum dots (QDs)/CdS core/shell nanospheres with a hierarchical heterostructure have been prepared by a simple microwave hydrothermal method. The as-prepared samples are characterized by XRD, TEM, SEM, UV-VIS diffuse reflectance spectra (DRS)...

The transition metal dichalcogenides (MX₂, TMD) are a family of two-dimensional compounds, and MoS₂ is perhaps the most representative material among them. MoS₂, in its bulk form, is semiconductive, with an indirect band gap of around 1.2–1.3 e...

We present a study with a numerical model based on $\overrightarrow{k}·\overrightarrow{p}$, including electromechanical fields, to evaluate the electromechanical and optoelectronic properties of single GaAs quantum dots embedded in direct band gap AlGaAs nanowires. T...

A novel turn-on fluorescence assay was developed for the rapid detection of glutathione (GSH) based on the inner-filter effect (IFE) and redox reaction. Molybdenum disulfide quantum dots (MoS₂ QDs), which have stable fluorescent properties, were synt...

In this research study, the effects of different parameters on the electron transfer rate from three quantum dots (QDs), CdSe, CdS, and CdTe, on three metal oxides (MOs), TiO₂, SnO₂, and SnO₂, in quantum-dot-sensitized solar cells (QDSSCs) with porou...