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Non-volatile Organic Transistor Memory based on Black Phosphorus Quantum dots as Charge Trapping Layer
摘要： High performance organic nano-floating gate transistor memory (NFGTM) has important prerequisites of low processing temperature, solution–processable layers and charge trapping medium with high storage capacity. We demonstrate organic NFGTM using black phosphorus quantum dots (BPQDs) as a charge trapping medium by simple spin-coating and low processing temperature (< 120 oC). The BPQDs with diameter of 12.6 ± 1.5 nm and large quantum confined bandgap of ~2.9 eV possess good charge trapping ability. The organic memory device exhibits excellent memory performance with a large memory window of 61.3 V, write-read-erase-read cycling endurance of 103 for more than 180 cycles and reliable retention over 10,000 sec. In addition, we successfully improved the memory retention to ON/OFF current ratio > 104 over 10,000 sec by introducing PMMA as the tunneling layer.
关键词： floating gate transistor,organic memory,solution-processed,Black phosphorus,quantum dots
更新于2025-09-23 15:21:01
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Black Phosphorus Quantum Dots in Aqueous Ethylene Glycol for Macroscale Superlubricity
摘要： In this study, black phosphorus quantum dots (BPQDs) have been successfully prepared at a low cost and high yield by liquid-based high energy ball milling method. The obtained BPQDs with an average lateral size of 6.5 ± 3 nm and a thickness of 3.4 ± 2.6 nm dispersed stably in ethylene glycol (EG). A robust macroscale superlubricity state (μ: 0.002) was achieved under a high contact pressure of 336 MPa via the lubrication of BPQDs-EG aqueous suspension (BPQDs-EGaq) at the Si3N4/sapphire frictional interface. The wear rate lubricated by BPQDs-EGaq suspension account for 5.96% of that lubricated by EG aqueous solution (EGaq), demonstrating the improvement in the anti-wear property with the addition of BPQDs. The rolling effect of BPQDs and the low shear stress between the BPQDs interlamination played important roles in the improvement in the anti-wear property. The oxidative products of BPQDs (PxOy) contributed to the effective realization of macroscale superlubricity. This work realized macroscale superlubricity at a high contact pressure by combining the BPQDs with special liquid molecules and provided the great potential in industrial applications.
关键词： Interface,Black phosphorus quantum dots,Mixed lubrication,high contact pressure,Liquid macroscale superlubricity
更新于2025-09-23 15:21:01
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Black phosphorus quantum dots as novel electrogenerated chemiluminescence emitters for the detection of Cu2+
摘要： For the first time, electrochemiluminescence (ECL) emission was observed from black phosphorus quantum dots (BPQDs) in the presence of K2S2O8 as the co-reactant. The potential application of BPQDs in ECL analytical chemistry was also demonstrated using Cu2+ as an example.
关键词： Cu2+ detection,black phosphorus quantum dots,electrochemiluminescence
更新于2025-09-23 15:19:57
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Black Phosphorus Quantum Dots Cause Nephrotoxicity in Organoids, Mice, and Human Cells
摘要： Quantum dots (QDs) have numerous potential applications in lighting, engineering, and biomedicine. QDs are mainly excreted through the kidney due to their ultrasmall sizes; thus, the kidneys are target organs of QD toxicity. Here, an organoid screening platform is established and used to study the nephrotoxicity of QDs. Organoids are templated from monodisperse microfluidic Matrigel droplets and found to be homogeneous in both tissue structure and functional recapitulation within a population and suitable for the quantitative screening of toxic doses. Kidney organoids are proved displaying higher sensitivity than 2D-cultured cell lines. Similar to metal-containing QDs, black phosphorus (BP)-QDs are found to have moderate toxicity in the kidney organoids. The nephrotoxicity of BP-QDs are validated in both mice and human renal tubular epithelial cells. BP-QDs are also found to cause insulin insensitivity and endoplasmic reticulum (ER) stress in the kidney. Furthermore, ER stress-related IRE1α signaling is shown to mediate renal toxicity and insulin insensitivity caused by BP-QDs. In summary, this work demonstrates the use of constructed kidney organoids as 3D high-throughput screening tools to assess nanosafety and further illuminates the effects and molecular mechanisms of BP-QD nephrotoxicity. The findings will hopefully enable improvement of the safety of BP-QD applications.
关键词： kidney,organoids,nanosafety assessment,black phosphorus,quantum dots
更新于2025-09-23 15:19:57
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Black phosphorus quantum dots in inorganic perovskite thin films for efficient photovoltaic application
摘要： Black phosphorus quantum dots (BPQDs) are proposed as effective seed-like sites to modulate the nucleation and growth of CsPbI2Br perovskite crystalline thin layers, allowing an enhanced crystallization and remarkable morphological improvement. We reveal that the lone-pair electrons of BPQDs can induce strong binding between molecules of the CsPbI2Br precursor solution and phosphorus atoms stemming from the concomitant reduction in coulombic repulsion. The four-phase transition during the annealing process yields an α-phase CsPbI2Br stabilized by BPQDs. The BPQDS/CsPbI2Br core-shell structure concomitantly reinforces a stable CsPbI2Br crystallite and suppresses the oxidation of BPQDs. Consequently, a power conversion efficiency of 15.47% can be achieved for 0.7 wt % BPQDs embedded in CsPbI2Br film-based devices, with an enhanced cell stability, under ambient conditions. Our finding is a decisive step in the exploration of crystallization and phase stability that can lead to the realization of efficient and stable inorganic perovskite solar cells.
关键词： inorganic perovskite,phase stability,Black phosphorus quantum dots,photovoltaic application,crystallization
更新于2025-09-19 17:13:59
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PEGylated-folic acida??modified black phosphorus quantum dots as near-infrared agents for dual-modality imaging-guided selective cancer cell destruction
摘要： Biological systems have high transparence to 700–1100-nm near-infrared (NIR) light. Black phosphorus quantum dots (BPQDs) have high optical absorbance in this spectrum. This optical property of BPQDs integrates both diagnostic and therapeutic functions together in an all-in-one processing system in cancer theranostic approaches. In the present study, BPQDs were synthesized and functionalized by targeting moieties (PEG-NH2-FA) and were further loaded with anticancer drugs (doxorubicin) for photodynamic–photothermal–chemotherapy. The precise killing of cancer cells was achieved by linking BPQDs with folate moiety (folic acid), internalizing BPQDs inside cancer cells with folate receptors and NIR triggering, without affecting the receptor-free cells. These in vitro experiments confirm that the agent exhibited an efficient photokilling effect and a light-triggered and heat-induced drug delivery at the precise tumor sites. Furthermore, the nanoplatform has good biocompatibility and effectively obliterates tumors in nude mice, showing no noticeable damages to noncancer tissues. Importantly, this nanoplatform can inhibit tumor growth through visualized synergistic treatment and photoacoustic and photothermal imaging. The present design of versatile nanoplatforms can allow for the adjustment of nanoplatforms for good treatment efficacy and multiplexed imaging, providing an innovation for targeted tumor treatment.
关键词： drug release,black phosphorus quantum dots,synergistic therapy,targeted,photoacoustic imaging
更新于2025-09-19 17:13:59
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Tunable multiwavelength erbium-doped fiber laser based on BPQDs packaged by poly tetra fluoroethylene and two segments of PMF
摘要： Two types of tunable and stable multiwavelength erbium-doped fiber lasers(MWEDFLs) are proposed and experimentally demonstrated, which are based on novel poly tetra fluoroethylene packaging device of black phosphorus quantum dots (PTFEPD-BPQDs) and two sections of polarization maintaining fiber(PMF) in cascade/in parallel. The novel fabrication process uses silica capillaries and PTFE to package BPQDs. The PTFEPD-BPQDs has the function of suppressing the mode competition and stabilizing the multiwavelength output. The channel space and wavelength number of the two types of tunable MWEDFLs can be tuned by adjusting polarization controllers(PCs). In the experiments, for the unpackaged BPQDs device, BPQDs will degrade and lose its function within 48 h, while for the PTFEPD-BPQDs, BPQDs can keep its function for more than 3 weeks. By adjusting the PC, in the cascaded structure, the multiwavelength channel spacing can be tuned among nearly 1.98, 0.67 and 0.43 nm, and the number of multiwavelength output is 4, 9 and 13, respectively.
关键词： Tunable,Two sections of polarization maintaining fiber,Multiwavelength erbium-doped fiber laser,Black phosphorus quantum dots
更新于2025-09-16 10:30:52
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Black/red phosphorus quantum dots for photocatalytic water splitting: from a type I heterostructure to a Z-scheme system
摘要： By virtue of the quantum confinement effect, the junction between black phosphorus and red phosphorus changes from a type I heterostructure for bulk materials to a Z-scheme system for quantum dots. The Z-scheme system of black/red phosphorus quantum dots (BP/RP-QD) achieves H2 evolution from water splitting in the absence of sacrificial agents.
关键词： red phosphorus,black phosphorus,quantum dots,photocatalytic water splitting,Z-scheme system
更新于2025-09-12 10:27:22