CAS 7440-05-3 Pd nanopowder Ultrafine Palladium as catalyst
Size:20-30nm Purity:99.95% CAS No:7440-05-3 ENINEC No.:231-115-6 Appearance:black Powder Shape:spherical
Size:20-30nm Purity:99.95% CAS No:7440-05-3 ENINEC No.:231-115-6 Appearance:black Powder Shape:spherical
We can supply different size products of niobium silicide powder according to client's requirements. Size:1-3um; Purity:99.5%;Shape:granular CAS No:12034-80-9;ENINEC No.:234-812-3
Ni2Si particle,99.5% purity,granular shape,is used for Microelectronic integrated circuit, nickel silicide film,etc. Size:1-10um; CAS No:12059-14-2;ENINEC No.:235-033-1
In the field of quantum dot light-emitting diodes (QLEDs), CdSe based quantum dots have been widely studied and have achieved excellent performance in red and green emitting QLEDs. However, to achieve blue luminescence, CdSe nuclei need to become extremely small (diameter<2nm), which can lead to unstable surface properties, resulting in lower external quantum efficiency (EQE) of blue QLEDs compared to red and green QLEDs. The journal Angew reports that researchers have successfully prepared high-performance blue QLED devices by designing and synthesizing g-CdZnSeS/ZnS quantum dots with unique structures, achieving a breakthrough EQE of up to 24%. The optimized gradient component released the core/shell lattice stress. Due to the suppression of exciton transfer and Auger recombination, the external quantum efficiency (EQE) of blue QLEDs with large CdZnSeS alloy nuclei has achieved a breakthrough of 24%. In this work, researchers synthesized a giant CdZnSeS alloy core by diffusing zinc atoms into the CdSeS core, which can optimize the gradient composition and release the core/shell lattice stress. The outer shell is composed of 1-2 single-layer ZnS layers, resulting in a gradient change in the composition of the entire quantum dot. This structural design not only effectively suppresses exciton transfer and Auger recombination, but also lowers the Fermi level, thereby improving the internal confinement of excitons. g-CdZnSeS/ZnS quantum dots exhibit monodispersity and a photoluminescence quantum yield (PLQY) of up to 95%. Based on the excellent performance of quantum dots, researchers have prepared QLED devices using polyvinyl carbazole (PVK) as the hole transport layer and ZnMgO nanoparticles as the electron transport layer. The results show that the maximum brightness of g-CdZnSeS/ZnS QLED devices is about 57000 cd/m2, the turn-on voltage is about 3.8V, and the maximum EQE is about 24%, while the maximum EQE of QLED devices based on the other two core/shell structures is only 8%. In addition, the EQE of 48 devices prepared through different batches of experiments was mainly concentrated in the range of 21% -24%, showing excellent repeatability. At different voltages of 3-9V, the peak value of the electroluminescence (EL) spectrum stabilizes at 479nm. At a constant current density of 8000cd/m2, the working life (T50) of the device is 10 hours, and it can be inferred that the T50 at an initial brightness of 100cd/m2 is approximately 27000 hours. The method proposed in this work provides valuable insights and guidance for developing high-performance blue QLEDs. Future research can further optimize the synthesis methods of quantum dots and the device structure of QLEDs to achieve higher efficiency and stability. Literature name: Improving Internal Exciton Confinement for Efficient CdZnSeS-Based Blue Quantum Dot Light-Emitting Diodes
Read MoreCarbon quantum dot CQDs, as environmentally friendly luminescent materials, typically exhibit high quantum yields under photoluminescence conditions. Traditional CQDs can achieve a photoluminescence quantum yield (PLQY) of over 80% in solution, but PLQY significantly decreases in solid-state thin films, resulting in LED devices based on CQDs being much lower in brightness and efficiency than heavy metal containing quantum dot devices. Developing novel CQDs that can enhance luminescence in the matrix has become a key challenge in promoting the development of the next generation of sustainable luminescence technologies. The journal Advanced Functional Materials reports that researchers have developed a novel class of carbon quantum dots MIE-CQDs with unprecedented matrix induced luminescence enhanced MIE effect through rational molecular engineering design. These MIE-CQDs were synthesized by solvothermal method under strong alkaline ethanol conditions using 2,5-dimethoxyphenyl-1,4-diformaldehyde DMDD and 2-naphthylacetonitrile as precursors. Unlike conventional CQDs, MIE CQDs exhibit only 15% PLQY in dilute solution, but increase to 31% in solid powder. However, when dispersed in polymer matrices such as polymethyl methacrylate PMMA, their PLQY is significantly enhanced to over 70%. Through comprehensive structural, optical, and photophysical analysis, researchers have confirmed that the enhancement effect originates from restricted intramolecular motion in non planar structures, effectively suppressing non radiative recombination. Based on the excellent solid-state luminescence performance of MIE CQDs, the research team has constructed a solution processed electroluminescent device. By doping MIE CQs into the thermally activated delayed fluorescence TADF material CzAcSF as the host matrix and combining PO-T2T as the electron transport layer, the device achieved efficient exciton collection and energy transfer. The optimized LED emits at 510nm, with a maximum brightness exceeding 10000cd m-2, a current efficiency of 20cd A-1, and an external quantum efficiency EQE exceeding 7%, significantly breaking through the performance bottleneck of traditional fluorescent CQDs LEDs. In addition, the device constructed directly with MIE CQDs as the luminescent layer emitted at 603nm, achieving a high brightness of 8366cd m-2, setting a new record for the brightness of long wavelength CQDs LEDs. This study provides an effective strategy for designing high-performance matrix induced luminescence enhanced carbon quantum dots, which is expected to promote the development of light-emitting diode technology. Literature name: unprecedented Matrix-Induced Emission Enhancement Enables Bright and Efficient Carbon Quantum Dot-Based Electroluminescent Light-Emitting Diodes
Read MorePerovskite quantum dots have the advantages of high color purity, high radiation recombination efficiency, and solution processability, making them naturally suitable for high-end displays and microdisplay devices. However, there is always a bottleneck in truly transforming "superlattice orderliness" into "device performance advantages". How to simultaneously achieve long-range in-plane ordering, ultra-thin vertical confinement, and pixel level precise patterning has always been a problem that needs to be solved. Recently, the journal Nature reported that researchers proposed a ligand fluoride co stabilization strategy to synergistically regulate the surface of CsPbBr3 quantum dots using the tertiary ammonium ligand BHOA and tetrabutylammonium fluoride (TBAF). CsPbBr3 perovskite quantum dots with high geometric symmetry, narrow size distribution, and strong surface binding ability were synthesized in a rhombic dodecahedron morphology. Pixelated perovskite quantum dot superlattice thin film arrays were successfully prepared using capillary liquid bridge confinement assembly technology. Benefiting from stronger surface binding, the photoluminescence quantum yield of BHOA+F quantum dot solution reached 94.6%, and the complete luminescence intensity could still be maintained after 72 hours of air aging at 60 ℃; The T90 of the corresponding thin film under air and ultraviolet irradiation exceeded 700 hours, much higher than the 4 hours of the OLA system. Subsequently, the authors used capillary liquid bridge restricted assembly to induce localized crystallization of quantum dots in micro column templates, obtaining a pixelated superlattice thin film with a thickness of about 25 nm and a thickness of about two layers of quantum dot monolayers. Compared with the spin coating control, the superlattice film exhibits better structural and optoelectronic properties: the transient absorption bleaching peak linewidth decreases from 93.6meV to 70.1meV, the bleaching peak position drift Δ E decreases from 17.4meV to 8.9meV, the steady-state emission half width narrows from 19.4nm to 17.1nm, the absolute PLQY of the film increases from 68.8% to 82.3%, the conductivity increases from 2.01 × 10-4Sm-1 to 4.52 × 10-4Sm-1, and a band transport characteristic of d μ/dT<0 appears below 188K. To verify the potential of practical display applications, the research team directly integrated superlattice arrays with commercial low-temperature polycrystalline silicon thin film transistor backplates, and fabricated an active matrix display screen with a resolution of 300 PPI and a size of 1.85 inches. The turn-on voltage of pixelated superlattice LED decreased from 2.4V to 2.2V, the peak external quantum efficiency (EQE) reached 30.9%, the maximum brightness reached 117144cd m-2, and the highest resolution reached 5080PPI; Among the 40 device statistics, the average EQE reached 27.4%, significantly higher than the 21.7% of the spin coating control. More importantly, the de...
Read MoreElectrotherapy strategies have shown great potential in tumor treatment, especially in electrodynamic therapy (EDT) which utilizes platinum based (Pt) nanomaterials to catalyze the production of reactive oxygen species (ROS) under an electric field to kill tumor cells. However, traditional electrocatalytic reactions are limited by the two-dimensional space of the electrode/electrolyte interface, the reaction area is limited, and the catalytic efficiency is not high. In addition, how to organically combine electrotherapy with chemotherapy and immunotherapy to achieve synergistic effects is an important direction in current cancer treatment research. On March 11, 2026, ACS Nano reported that researchers had developed an injectable composite conductive hydrogel (SA/ Gel@PPy /Pt NWs/Pt NPs， Abbreviated as SGPP CHs. The hydrogel is based on sodium alginate, and is passed through gelatin @ polypyrrole（ Gel@PPy ）Collaborate with platinum nanowires (Pt NWs) to construct a three-dimensional conductive network and load platinum nanoparticles (Pt NPs). The injectable conductive gel is applied in situ to wrap tumor tissue. Then, two platinum needle electrodes are inserted into the gel area, and the internal three-dimensional electrode network is connected with the external circuit to form a complete conductive circuit for treatment. The introduction of three-dimensional electrode network breaks through the space limitation of traditional electrocatalysis technology and extends the active interface from the surface of platinum electrode to the three-dimensional space of hydrogel, thus significantly improving the catalytic efficiency. Under the action of square wave alternating current, the chloride ion pre loaded in the hydrogel can promote the continuous occurrence of catalytic electroreduction (CER) on platinum nanowires and platinum electrodes. The platform utilizes endogenous chloride ions to continuously produce hypochlorous acid (HClO), while HClO oxidizes and degrades platinum materials, releasing platinum ions (Pt2+/Pt4+). The two synergistically induce immunogenic cell death (ICD) of tumor cells and activate anti-tumor immunity. In addition, the excellent injectability of the hydrogel enables it to achieve the bonding and coverage of tumor tissue, significantly increasing the contact area, thus promoting the effective accumulation and local release of therapeutic agents (hypochlorite, platinum ions) at the focus, and synergistically enhancing the immune activation and platinum chemotherapy effects. It is worth noting that the controllable degradation of platinum based materials during electrotherapy further enhances the biocompatibility and safety of the treatment platform. In the breast cancer mouse model, the tumor inhibition rate was 83%, and the anti-tumor immune response was effectively activated. This study provides a new approach for electrotherapy strategies to overcome interface limitations and achieve multimodal collaborative therapy. Liter...
Read MoreTriple negative breast cancer is characterized by strong invasion, high recurrence rate and poor prognosis due to the lack of expression of estrogen receptor, progesterone receptor and HER2. At present, there is still a lack of effective targeted treatment. On March 20, 2026, the journal Bioactive Materials reported that researchers used polysaccharide protein complexes (PSP) derived from edible mushrooms to modify nano selenium, constructing highly stable and biocompatible PTR SeNPs. Furthermore, by targeting and modifying MUC1 antibodies, a selenium nano delivery system with precise targeting ability was constructed（ MUC1@PTR-SeNPs ）, significantly inhibit the progress of TNBC in vivo and in vitro, providing a new strategy for precise treatment in the field of breast cancer tumor rehabilitation. Researchers systematically evaluated the anti-tumor activity of PTR SeNPs in 17 human TNBC cell lines and found that they exhibited potent proliferation inhibition on various TNBC cells, while exhibiting extremely low toxicity to normal cells. Mechanism studies have shown that PTR SeNPs activate the MAPK signaling pathway, regulate the expression of Bcl-2 family proteins, induce mitochondrial membrane potential loss, release apoptotic factors such as cytochrome c and Smac/Diablo, and ultimately activate the Caspase-9/Caspase-3 cascade reaction, inducing mitochondrial dependent apoptosis in TNBC cells. To further enhance targeting, researchers coupled PTR SeNPs with anti-MUC1 antibody Fab fragments and constructed MUC1@PTR-SeNPs In TNBC cells with high expression of MUC1, this nanosystem significantly enhances anti-tumor activity. In the MDA-MB-468 tumor bearing mouse model, after oral administration for 30 days, MUC1@PTR-SeNPs Significantly inhibit tumor growth, induce activation of Caspase-9 and PARP in tumor tissue, and promote cell apoptosis. Blood biochemistry and histopathological analysis showed that the nanomedicine has good in vivo safety and did not cause significant liver or kidney toxicity. The innovation of this study lies not only in revealing the molecular mechanism of nano selenium induced apoptosis in TNBC, but also in the organic fusion of "targeted delivery" and "biological functions of selenium". Unlike conventional chemotherapy, MUC1@PTR-SeNPs On the one hand, by targeting and recognizing the highly expressed MUC1 antigen on the surface of tumor cells, precise delivery can be achieved, reducing damage to normal tissues; On the other hand, the metabolic products of nano selenium in the body can participate in the synthesis of selenoproteins (such as glutathione peroxidase and selenoprotein P), exerting systemic antioxidant and immune regulatory effects, helping to improve the common systemic inflammatory state and immune suppression in cancer patients, which is in line with the concept of "local treatment+systemic regulation" in tumor rehabilitation. Literature name: Translational selenium nanoparticles trigger apoptosis in triple-neg...
Read MoreMitochondria, as the energy center and core of apoptosis regulation in cells, are important targets for precise treatment of tumors. Directly delivering drugs or nucleic acids to mitochondria can effectively induce tumor cell death and overcome drug resistance. However, nanoparticles need to cross multiple biological barriers in vivo to reach mitochondria. Therefore, it is crucial to develop mitochondrial targeted nanomaterials that can efficiently cross multiple layers of barriers. Gold nanoparticles are considered an ideal platform for mitochondrial targeted therapy due to their stable structure, excellent photothermal performance, and easy surface modification. However, there is currently a lack of systematic comparative studies at the subcellular level in vivo. On February 17, 2026, the journal Advanced Materials reported that researchers have developed a high-throughput in vivo screening system based on DNA barcodes, which can simultaneously evaluate the distribution of multiple gold nanoparticles at the organ, cell type, and mitochondrial levels, achieving rapid screening of material libraries. The study first verified the stability and reliability of the DNA barcode system in vitro. Six PEG/TPP modified gold nanoparticles maintained barcode stability under different pH, serum environment, and oscillation conditions, without affecting cell uptake and mitochondrial localization. Subsequently, the research expanded to a material library containing 30 types of gold nanoparticles, covering five morphologies (sphere, rod, triangle, cube, bipyramid), two sizes (40/80nm), and three types of tumor targeting ligands (FA, HA, RGD). By injecting a mixed material library into subcutaneous, in situ, and contralateral tumor models, researchers obtained over 1000 in vivo data at the tissue, cell subpopulation, and mitochondrial levels. The results showed that mitochondrial targeting ability is highly correlated with tumor accumulation, and a single factor (morphology, size, or ligand) is not sufficient to determine the final expression, but rather multiple parameters work together. The two types of materials with the best performance are large-sized cubes (CL-FA) and large-sized spherical particles (PL-FA). In the treatment validation, the researchers chose CL-FA as a candidate material, loaded with mitochondria targeting siATP6, and combined with mild photothermal therapy (approximately 47-48 ° C). The results showed that a single treatment can achieve 99% tumor suppression, accompanied by significant mitochondrial damage, decreased ATP levels, and increased cell apoptosis. At the same time, TAMs transform from immune suppressive M2 to immune activated M1, reshaping the tumor immune microenvironment. Both histological analysis and weight monitoring indicate that this treatment strategy has good safety. This platform can not only be used for rapid screening of mitochondrial targeted materials, but also for analyzing the behavior of nanoparticles in differ...
Read More
online service
13929258449
admin@satnano.com
+ 8613929258449