Journal of Physical Chemistry Letters
·
2026
·Vol. 17
·期 30
·8670-8678
·
IF 4.5
Wang Yue,Shi Jiajuan,Mao Huimin,Shan Xuanyu,Liu Wei,Zheng Jiahui,Tao Ye,Zhao Xiaoning,Lin Ya,Wang Zhongqiang
Optoelectronic synapses that integrate light sensing
and processing
functions have attracted significant interest for their potential
to develop neuromorphic vision systems. In particular, an all-optically
modulated device is highly desired for high-efficiency image information
processing. Here, an optoelectronic synapse with all-optical modulation
based on perovskite nanocrystal and InGaZnO (IGZO) heterojunctions
is demonstrated. Excitatory and inhibitory synaptic plasticity can
be obtained under 320 and 532 nm irradiation, which stem from the
ionization and deionization process of oxygen vacancies in IGZO. Moreover,
five basic optoelectronic logic operations are implemented in the
optoelectronic synapse via fully light-controlled methods. By utilizing
the frame difference algorithm, the function of motion detection is
demonstrated for recognizing classic moving vehicles with an accuracy
exceeding 90%. This work provides a promising approach to developing
all-optically modulated artificial synapses and shows great potential
in neuromorphic vision systems.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Tuo Li,Yulu Ye,Zipeng Deng,Yunbo Li
A facile strategy to fabricate AgNW films decorated with AuNPs via filtration. • AuNP coating enhances mechanical and chemical stability of AgNW films. • Optimized film has efficient nitrophenol reduction monitored by absorption spectra. • 2D-COS analysis reveals reaction pathway and electron transfer mechanism. To fabricate silver nanowire (AgNW) films with high efficiency and stability in the catalytic reduction remains a major challenge. Herein, a facile strategy to fabricate AgNW films decorated with gold nanoparticles (AuNPs) was demonstrated via vacuum filtration with thermal treatment. The results show that AuNPs are densely deposited onto the AgNWs and significantly enhance the mechanical and chemical stability. The optimized film (AgNWs:AuNPs volume ratio = 1:2) achieves an apparent rate constant of 0.17 min −1 for 2-nitrophenol reduction and retains 94.8% of its initial activity after ten consecutive cycles monitored by absorption spectra. Two-dimensional correlation spectroscopy analysis further elucidates the reaction pathway, the sequential order of intermediate generation and consumption during the catalytic reduction. Spontaneous electron transfer enriches electrons on the AuNPs surface promotes the generation of active hydrogen species and accelerates catalytic reduction. This work provides a facile fabrication platform for high-performance AgNW films and provides deeper insight into hydrogen enrichment catalysis for sustainable wastewater treatment. Download: Download high-res image (182KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Kefei Cheng,Xianghan Ye,Yating Zhu,Kaixuan Meng,Yinyin Qian
The synthesis of efficient heterojunction nanocomposite with optimized carrier dynamics remains a key challenge in material design. Herein, we report the electrostatic assembly of a CsCu 2 Br 3 /Ag 2 Se heterojunction nanocomposite, in which oppositely charged nanocrystals spontaneously integrate through electrostatic interactions, forming intimate interfacial contact and thereby enhancing carrier transfer. The resulting type-II band alignment induces carrier redistribution at the interface and generates an internal electric field that enables carrier separation without the need for external bias. Density functional theory calculations and ultraviolet photoelectron spectroscopy results confirm the type-II alignment, providing insights into interfacial carrier dynamics. The device exhibits a broadband photoresponse from 405 to 1550 nm, with high photocurrent, reduced noise, and rapid response times (37.1 and 28.4 μs for rise and decay, respectively). Furthermore, the device exhibits stable performance, high-frequency modulation (∼7 kHz), and spatially resolved photocurrent mapping, indicating its potential for near-infrared imaging. Overall, the results demonstrate that electrostatic assembly is an effective strategy for engineering type-II heterojunction interfaces for self-powered broadband photodetection Download: Download high-res image (215KB) Download: Download full-size image
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ULTRASONICS SONOCHEMISTRY
·
2026
·
IF 10.2
Shengxin Zhu,Jianwei Liao,Longshi Rao,Yuying Wang,Xiang Huo,Qinghao Zhong,Haoyu Chen,Guisheng Zhong,Xiaodong Niu
Halide perovskite quantum dots (HPQDs) are transformative candidates for next-generation optoelectronic devices, owing to their exceptional optoelectronic properties including widely tunable bandgaps, ultrahigh color purity, and solution processability. However, scalable, deterministic synthesis of high-quality HPQDs with simultaneous ultra-narrow emission linewidth and high photoluminescence quantum yield (PLQY) remains a longstanding challenge, fundamentally limited by the mass transfer bottleneck and poor mixing efficiency of conventional laminar microreactors. Here, we report a biomimetic vein-inspired ultrasonic microreactor integrated with sharp-edged microstructure arrays to address this core challenge. Through systematic multiphysics simulations, we quantitatively decode the acoustic-hydrodynamic coupling mechanism in the microreactor, and establish a quantitative structure-performance relationship between microstructure geometry and sonochemical reaction performance. We identify an optimized cylindrical microstructure configuration that synergistically amplifies acoustic streaming and cavitation yield to break laminar boundary layer confinement. Experimental validation confirms the optimized microreactor enables continuous synthesis of high-quality HPQDs with an ultra-narrow full width at half maximum of 23.28 nm and PLQY up to 78.6%, markedly outperforming conventional microfluidic methods. We further elucidate that cavitation-enhanced micromixing enables dynamic supersaturation tuning, driving LaMer-type size-focusing and homogeneous nucleation for exceptional HPQDs monodispersity. This work provides a generalizable, scalable microfluidic strategy for precision synthesis of high-performance optoelectronic nanomaterials, bridging the critical gap between lab-scale research and industrial translation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Zhanpeng Wang,Tonghua Hu,Peng Yang,Jian Huang,Luyang Hou,Yichi Zhong,Hongyu Yang,Jian Xiong,Jingzhou Li,Hongxing Dong,Long Zhang
The spatial distribution characteristic of the superlattices sizes on the assembly substrates was revealed. • A kinetic regulation strategy was proposed to achieve CsPbBr 3 superlattice size tunable. • The superlattices fabricated via our method host the capability of ultra-fast superfluorescence emission. Superfluorescence in self-assembled CsPbBr 3 superlattices of colloidal quantum dots (QDs) has garnered extensive attention due to its ultra-fast, intense burst emission. Among the available fabrication methods for superlattices, saturated solvent evaporation remains widely utilized for its operational simplicity and cost-effectiveness. However, this conventional method exhibits poor controllability and process randomness owing to the absence of a stable preparation platform, thereby hindering controlled self-assembly. Here, a high-temperature (30–70 °C) saturated solvent evaporation method was developed for size-tunable and efficient preparation of high-quality CsPbBr 3 superlattices. In this approach, the coffee-ring effect governs assembly by driving solute transport, inducing a distinct spatial gradient where superlattice size decreases from the substrate edge to center. Systematic modulation of assembly temperature and QD concentration enables adjustability of superlattice dimensions. Specifically, higher temperatures attenuate solute migration, thereby reducing superlattice size, while increased QD concentration strengthens inter-dot interactions to promote the formation of larger superlattices. A near-100-fold radiative acceleration of the prepared superlattices compared to conventional QD films demonstrates the ultrafast superfluorescence emission capability. Combined with their potential for scalable production, a material foundation was provided for ultrafast photonic applications. And it also opens up a reliable pathway for superlattice fabrication, laying a foundation for future size-dependent superlattice research and the development of high-performance optoelectronic devices. Download: Download high-res image (151KB) Download: Download full-size image
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ACS Nano
·
2026
·
IF 17.3
Yutao Yang,Feifei Chen,Xiachu Xiao,Jianru Wang,Xiang Zhang,Borui Jiang,Yuxiang Xin,Zhitong Zhou,Zhengzheng Liu,Jiang Tang,Jiajun Luo,Zhuolei Zhang
Soft-lattice nanocrystal photon management hinges on controlling relaxation branching, diverting excitations from interfacial losses into radiative pathways. CsPbCl3:Yb3+ quantum cutting benchmarks this, but is still constrained by surface trapping, suboptimal Yb-pair branching energetics, and limited thermal/environmental stability. Here we implement a (2-bromoethyl)trimethylammonium bromide (BETAB)-enabled passivation strategy with annealing-triggered gradient halide reconstruction. BETAB replaces OA/OAm to reduce surface losses, while mild annealing activates ligand-associated Br– as a local reservoir to drive Br– in-diffusion with Cl– counter-migration, writing a continuous radial Cl/Br gradient (Br-rich interior). The graded halide landscape suppresses interfacial quenching and creates a radial band-edge bias that funnels excitations into the QC pathway, accelerating exciton-to-Yb3+ transfer. Consequently, QC PLQY increases stepwise from 84.7% (pristine) to 125.4% (BETAB-treated) and 155.2% (annealed). Integrated as spectral-conversion films on Si photodetectors, the treated NCs enable 200–1100 nm detection with responsivity up to 0.5 A W–1, EQE of 64.17%, and D* >1.02 × 1012 Jones (300–1100 nm) and 4.8 × 1011 Jones (200–300 nm), delivering clear ultrabroadband imaging in 7 × 7 arrays. The reconstructed NCs further show ATQ-like behavior (134% at ∼333 K) and improved aging stability (86.1% retention after 60 days vs 29.2% for pristine). Overall, ligand-enabled gradient writing reroutes relaxation for robust photon management.
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ACS Nano
·
2026
·
IF 17.3
Xizheng Ding,Cai Luo,Ziyi Fu,Shuo Li,Nannan Hu,Yi Wang,Zhixiang Yu,Jian Zhao,Baoli Liu,Xiaofeng Fan,Wenxu Yin,Xiaoyu Zhang,Yang Guo,Changzhi Gu
Precise control over spontaneous emission is central to next-generation quantum-dot light sources, yet colloidal emitters generally radiate into weakly structured spectral, angular, and polarization channels. Quasi-bound states in the continuum (Quasi-BIC) overcome this limitation by providing high Q-factors, symmetry-defined near-fields, and controlled radiative leakage. Here we realize all three advantages in a single platform by coupling red-emitting CsPbI3 quantum dots (QDs) to a symmetry-protected plasmonic quasi-BIC hosted by a one-dimensional gold grating. By jointly engineering the grating parameters and an atomic-layer-deposited Al2O3 spacer, we match the quasi-BIC (finite radiative leakage) resonance to the ∼690 nm emission of the QDs, enabling efficient near-field coupling while suppressing direct metal-induced quenching. Compared with a planar QD film, the grating-coupled structure achieves a peak photoluminescence (PL) enhancement of more than 4-fold. The emission response is strongly governed by the symmetry of the plasmonic mode: the PL intensity exhibits a pronounced dependence on the incident pump polarization, with a polarization anisotropy (PA) as high as 85.4%, while the emitted light itself reaches a degree of polarization (DOP) of 16.5%. In addition, the hybrid structure produces directional and collimated red emission with a divergence as low as 3°, accompanied by a clear wavelength–angle correlation. These results show that plasmonic quasi-BIC can serve not only as field-enhancing resonances but also as symmetry-defined optical channels for engineering QD emission. This work presents a compact strategy for integrating QD with metallic metasurfaces toward QD light sources featuring tunable emission direction and divergence, polarization sensitivity, and color selectivity.
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ACS Photonics
·
2026
·
IF 6
Yujia Luo,Yikun He,Yuyao Feng,Wanzhong Gu,Wanling Mao,Yixuan He,Liang Ke,Yuhui Dong,Yousheng Zou
Eco-friendly Ag–In–Ga–S (AIGS) quantum dots (QDs) are potential alternatives in white light-emitting diodes (WLEDs) due to their high photoluminescence quantum yield (PLQY) and tunable emission. The conventional stacked-film structure using multicomponent QDs suppresses reabsorption losses among different color QDs, but inevitably introduces interfacial optical losses and manufacturing complexity and cost. In this study, a single color-conversion blended film with uniform and excellent luminescence is fabricated using high-PLQY red-emitting (85%) and green-emitting (91%) AIGS QDs simultaneously incorporated into a PMMA matrix. This deliberately utilizes reabsorption governed by the relative ratio between red and green QDs rather than solely suppressing it, thereby eliminating interfacial losses and enhancing luminance, which results in higher photoluminescence emission while maintaining a nearly identical low blue-light transmittance. Furthermore, the blended-film WLED fabricated by integrating the blended film with a blue LED chip exhibited a higher luminance (532.3 cd/m2), representing a greater than 25-fold increase over the conventional stacked-film device (21.0 cd/m2). The blended-film WLED achieved CIE chromaticity coordinates of (0.31, 0.32) and a color rendering index (CRI) of 87.3. The study provides a better understanding of reabsorption in single-layer multicolor QD films and promotes the development of simple and efficient I–III–VI QD backlight films for white-light display applications.
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Nature Water
·
2026
·
IF 30.7
Liu Fu,Hao Fengkun,Sun Mingzi,Wang Helin,Yao Ning,Wang Yunhao,Wang Juan,Chen Peng,Ma Xintao,Zhou Jingwen,Xiong Yuecheng,Ma Yangbo,Wang Guozhi,Guo Liang,Meng Xiang,Shao Mingzheng,Wang Chaohui,Wang Miao,Qian Fangren,Ye Chenliang,Xi Shibo,Huang Bolong,Fan Zhanxi
Phase control of alloy nanomaterials can modulate their atomic/electronic structures towards various electrocatalytic applications. However, the controlled synthesis of high-entropy nanoalloys (HENAs) with unconventional phase remains challenging. Here we report the one-pot synthesis of RhCuNiInSb HENAs with the unconventional 2H phase through regulating the nucleation/growth kinetics. Compared with the face-centred cubic phase counterpart, 2H RhCuNiInSb HENAs exhibit superior electrocatalytic nitrate reduction performance at low nitrate concentration. Ex/in situ studies reveal the accelerated deoxygenation/hydrogenation kinetics and distinct reaction pathway. Theoretical calculations demonstrate the electronic optimizations induced by the face-centred-cubic-to-2H phase transition, where the electronic redistribution and p – d elemental interactions improve the surface electroactivity. When operated in flow cell, 0.5 l of simulated wastewater can be efficiently converted into the value-added ammonia-derived product within 10 h. With a 20-h electrolysis, the NO 3 − -N concentration in real industrial and agricultural wastewater can be both reduced above the World Health Organization standard for drinking water.
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Letters in Drug Design & Discovery
·
2026
·
IF 1.6
Chunxiu Tian,Ruihua Wang,Yuewei Li,Yuxia Gao
Background Atherosclerosis is a leading cause of cardiovascular morbidity and mortality. It is initiated by endothelial injury and progresses through persistent oxidative stress, endothelial senescence, and macrophage foam cell formation. Although current therapies primarily target lipid metabolism and inflammation, effective strategies that catalytically eliminate reactive oxygen species (ROS) and alleviate vascular senescence remain limited. Objective This study aimed to develop biocompatible copper indium selenium nanozymes (CIS NPs) with antioxidant enzyme-mimicking activities and evaluate their therapeutic potential against oxidative stress, cellular senescence, and atherosclerosis progression. Methods CIS NPs were synthesized and comprehensively characterized for morphology, crystallinity, elemental composition, and colloidal stability. Their superoxide dismutase (SOD)- and glutathione peroxidase (GPx)-like catalytic activities were evaluated in cell-free systems. The antioxidant and anti-senescent effects of CIS NPs were investigated in hydrogen peroxide-induced human umbilical vein endothelial cells (HUVECs). Their effects on foam cell formation were assessed in RAW 264.7 macrophages using Dil-oxLDL uptake and Oil Red O staining. Therapeutic efficacy and biosafety were further evaluated in high-fat diet-fed ApoE -/- mice. Results CIS NPs exhibited dual SOD- and GPx-like catalytic activities, enabling sequential scavenging of superoxide anion (O 2 • − ) and hydrogen peroxide (H 2 O 2) . In HUVECs, CIS NPs significantly reduced intracellular ROS levels, attenuated oxidative injury, and alleviated cellular senescence, as evidenced by decreased SA-β-gal staining. In RAW 264.7 macrophages, CIS NPs reduced Dil-oxLDL uptake and lipid accumulation, thereby suppressing foam cell formation. In ApoE -/- mice, repeated intravenous administration of CIS NPs markedly decreased atherosclerotic plaque burden, vascular ROS accumulation, and senescent cell abundance, without obvious abnormalities in the preliminary histological, biochemical, and hemolysis assessments. Conclusions CIS NPs function as efficient antioxidant nanozymes that mitigate oxidative stress, endothelial senescence, and macrophage foam cell formation. By targeting multiple pathological processes involved in atherosclerosis, CIS NPs effectively attenuate disease progression in vivo and represent a promising nanotherapeutic strategy for the prevention and treatment of atherosclerosis.
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ACS Nano
·
2026
·
IF 17.3
Zhang Huan,Liu Minrui,Zhou Zhongqin,Ye Pengfei,Wen Lingyi,Feng Quanqing,Song Ningning,Wang Yanyun,Ma Guohang,Sun Ran,Zhang Kun,Wu Qihong,Zhang Meng,Wang Yining,Guo Yingkun,Fan Haiming
Accurate
magnetic resonance imaging (MRI) of microvascular
occlusive
diseases, exemplified by subsegmental pulmonary embolism (SSPE), remains
a clinical challenge because of the intrinsic limitations of clinically
available Gd-based small molecular contrast agents (CAs). Ultrasmall
iron oxide nanoparticles (USIOs)-based CAs have emerged as promising
alternatives, offering adjustable MRI T 1 relaxivity, favorable pharmacokinetics, and high biocompatibility;
however, their performance is critically hampered by inefficient atomic
utilization for MR T 1 relaxivity enhancement.
Herein, we report Mg-doped USIOs MRI CAs with high atomic utilization
efficiency, where incorporating a biocompatible Mg dopant into surface
octahedral-site Fe vacancies substantially boosts the T 1 relaxivity, enabling accurate detection of SSPE-associated
structural and perfusion abnormalities. The Mg 0.03 -USIOs
exhibit a 261-fold enhancement of T 1 relaxivity
contribution by the Mg dopant, achieving an exceptionally high T 1 relaxivity of 12.6 mM −1 s −1 . Such a high atomic utilization efficiency could
stem from the promoted spin polarization and ferromagnetic spin alignment
through the surface Mg doping, which considerably boosts the magnetic
moment and outer-sphere relaxation contribution. Further in vivo MRI studies in a pig SSPE model demonstrated that the
Mg 0.03 -USIOs enabled visualization of structural and perfusion
abnormalities in SSPE, far surpassing the capabilities of Gd-based
CAs. In vivo biosafety assessment in the pig model
confirmed the high biocompatibility of Mg 0.03 -USIOs. Our
findings provide a highly efficient doping strategy to construct high-performance
USIOs-based T 1 CAs for sensitive MRI of
microvascular structural and functional abnormalities.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Teng Gao,Tianshu Chen,Haijiang Tian,Qiusheng Lin,Hongping Duan,Siyuan Li,Bosen Zhang
All-inorganic cesium lead halide perovskite quantum dots (CsPbX 3 QDs) exhibit exceptional optoelectronic properties but suffer from poor stability under ambient conditions, which severely limits their practical applications. In this work, a sequential passivation strategy was developed to simultaneously enhance the photoluminescence quantum yields (PLQYs) and long-term stability of CsPbX 3 QDs. First, 4-bromobutyric acid (BBA) and oleylamine (OLA) were employed as co-ligands during a recrystallization synthesis in aqueous solution, yielding BBA/OLA-capped CsPbX 3 QDs with improved water resistance. Subsequently, the as-prepared QDs were further treated with phenethylammonium bromide (PEABr) to passivate residual surface defects, particularly bromide vacancies, forming a dense hydrophobic ligand shell. Systematic characterization using transmission electron microscopy, X-ray diffraction, UV–vis absorption, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy revealed that the sequential passivation not only refines the morphology and crystallinity but also significantly suppresses non-radiative recombination. The resulting PEABr/BBA/OLA-CsPbX 3 QDs exhibit superior stability under various harsh conditions, including high humidity (70% RH), water immersion, continuous UV irradiation (365 nm), and elevated temperatures (up to 100 °C). As a proof of concept, a white light-emitting diode (WLED) was fabricated using the passivated QDs as the green-emitting layer together with a commercial InGaN blue chip and CsPb(Br/I) 3 red QDs. The device achieves Commission Internationale de l’Éclairage (CIE) color coordinates of (0.3302, 0.3261), a correlated color temperature of 5650 K, and a high color rendering index of 96, demonstrating stable white emission under varying driving currents. This sequential passivation strategy provides a facile and effective route to high-performance, ultra-stable CsPbX 3 QDs for next-generation display and solid-state lighting applications.
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