ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Xue-Hui Shi,Wei Zhao,Zhimou Yang,Lei Wang,Wenjie Ren
The development of sophisticated nanomaterials with synergistically enhanced functionalities and applications has been greatly promoted via the construction of Janus nanoparticles with controlled compositions. In this work, we described and demonstrated the formation of Janus Au-PbS nanoparticles (NPs) by Au NPs-mediated spontaneous epitaxial nucleation and growth. The mechanism of formation of Janus Au-PbS NPs was investigated in detail. Then, we also found that there was a strong electronic interaction between the Au NPs and PbS quantum dots (QDs) in Janus Au-PbS NPs, where electrons were transferred from the Au NPs domain to the PbS QDs domain. Moreover, the Janus Au-PbS NPs integrated the high-brightness tunable second near-infrared (NIR-II) photoluminescence emission and surface-enhanced Raman scattering (SERS), which achieved good intraoperative tumor resection. This complementary dual-functional imaging had the potential to enable more accurate tumor imaging and resection.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Hanyu Wang,Yanting Qi,Dan Wu,Qin Wei
In this study, lead(II) sulfide (PbS) nanocrystals were modified on nickel(II)oxide nanosheets (NiO NSs) via the chemical bath method. Afterwards, Au nanoparticles (NPs) were also modified successfully. A photoelectrochemical (PEC) self-powered platform for detecting sarcosine with high PEC activity was constructed. The capacity of NiO NSs to be loaded with other sensitizing materials was mainly attributed to its porous structure and large specific surface area. Under optimum conditions, the constructed PEC self-powered cathodic sensor for detecting sarcosine exhibited a linear range in 5.0 × 10 −8 –5.0 × 10 −2 mol/L with a detection limit (LOD) of 1.7 × 10 −8 mol/L. The biosensor demonstrated good reproducibility, acceptable stability and high specificity, thus confirming its potential application in the detection of other similar substances.
研究领域:
分析化学
·
材料科学
·
生物传感器
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiao Wang,Zhulu Song,Haodong Tang,Yiwen Li,Huaying Zhong,Jiufeng Wu,Weichao Wang,Simin Chen,Wenjie Zhang,Fan Fang,Junjie Hao,Dan Wu,Peter Müller-Buschbaum,Leifeng Cao,Zeguo Tang,Jun Tang,Lei Zhang,Kai Wang,Wei Chen
PbS quantum dots (QDs) are promising for short-wave infrared (SWIR) photodetection and imaging. Solid-state ligand exchange (SSLE) is a low-fabrication-threshold QD solid fabrication method. However, QD treatment by SSLE remains challenging in seeking refined surface passivation to achieve the desired device performance. This work investigates using NaAc in the ligand exchange process to enhance the film morphology and electronic coupling configuration of QD solids. By implementing various film and photodetector device characterization studies, we confirm that adding NaAc with a prominent adding ratio of 20 wt % NaAc with tetrabutylammonium iodide (TBAI) in the SSLE leads to an improved film morphology, reduced surface roughness, and decreased trap states in the QD solid films. Moreover, compared to the devices without NaAc treatment, those fabricated with NaAc-treated QD solids exhibit an enhanced performance, including lower dark current density (<100 nA/cm2), faster response speed, higher responsivity, detectivity, and external quantum efficiency (EQE reaching 25%). The discoveries can be insightful in developing efficient, low-cost, and low-fabrication-threshold QD SWIR detection and imager applications.
研究领域:
材料科学
·
纳米技术
·
光电技术
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2025
·Vol. 17
·期 19
·2597
·
IF 4.9
Shiwanyi Chen,Shufeng Li,Bing Wang,Chen Chen,Liuchun Zheng
In response to the escalating plastic pollution crisis, the development of high-performance biodegradable materials is critical. Poly(butylene succinate) (PBS) is an important biodegradable polymer as it possesses excellent biodegradability and processability. But it suffers from limitations such as low mechanical strength, poor thermal stability, and high production costs. In this study, taxus residue (TF), a waste by-product, was utilized as a reinforcing filler to reduce PBS costs while enhancing its overall performance. To address the interfacial incompatibility between TF and PBS, branched PBS (T-PBS) was introduced as a compatibilizer. The TF was surface-modified via alkali treatment and silane coupling (KH550), and a series of PBS/TF/T-PBS composites with varying T-PBS viscosity grades were prepared by melt blending. The compatibilization mechanism of T-PBS and its influence on the composite structure, crystallization behavior, thermal stability, rheological, and mechanical properties were systematically investigated. Results show that the branched structure significantly enhanced T-PBS melt strength and reactivity. The introduction of T-PBS effectively improved interfacial compatibility between TF and PBS matrix, reducing phase separation and interfacial defects. Compared to uncompatibilized PBS/TF composites, those with appropriately viscous T-PBS exhibited improved tensile strength (increased by 19.7%) and elongation at break (increased by 78.8%), while flexural strength was also maintained at an enhanced level. The branched points acted as nucleating agents, increasing the onset temperature and degree of crystallinity. In the high-temperature region, the synergistic barrier effect from TF and char residue improved thermal stability (T85%reached 408.19 °C). Rheological analysis revealed enhanced viscosity and elasticity of the system. This study provides a promising strategy and theoretical foundation for the high-value utilization of taxus waste and the development of high-performance biodegradable PBS-based composites.
研究领域:
高分子材料
·
生物降解材料
·
复合材料科学
·
资源循环利用
·
聚合物改性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2017
·
IF 9.466
Changwang Zhang,Yong Xia,Zhiming Zhang,Zhen Huang,Linyuan Lian,Xiangshui Miao,Daoli Zhang,Matthew C. Beard,Jianbing Zhang
A new strategy for narrowing the size distribution of colloidal quantum dots (QDs) was developed by combining cation exchange and quantized Ostwald ripening. Medium-sized reactant CdS(e) QDs were subjected to cation exchange to form the target PbS(e) QDs, and then small reactant CdS(e) QDs were added which were converted to small PbS(e) dots via cation exchange. The small-sized ensemble of PbS(e) QDs dissolved completely rapidly and released a large amount of monomers, promoting the growth and size-focusing of the medium-sized ensemble of PbS(e) QDs. The addition of small reactant QDs can be repeated to continuously reduce the size distribution. The new method was applied to synthesize PbSe and PbS QDs with extremely narrow size distributions and as a bonus they have hybrid surface passivation. The size distribution of prepared PbSe and PbS QDs are as low as 3.6% and 4.3%, respectively, leading to hexagonal close packing in monolayer and highly ordered three-dimensional superlattice.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Nanoscience
·
2013
·
IF 0
CHAO LIU,YANG JIANG,JIAN HUANG,HONGYAN DUAN
Lead sulfide ( PbS ) quantum dots (QDs) capped with oleic acid and oleic amine were synthesized by using safe and innocuous sulfur powder as S source instead of the bis (trimethylsilyl) sulfide ((TMS) 2 S). QDs with size distribution from 20 nm to 3 nm were gained by controlling the experiment parameters such as heating temperature, capping agents and the growth time. The morphology and crystal structure of the as-prepared PbS QDs were characterized by (high-resolution) transmission electron microscopy (HR-TEM) images and powder X-ray diffraction (XRD). This method may offer a new route to synthesize PbS QDs for photovoltaic devices.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
THIN SOLID FILMS
·
2016
·
IF 1.761
Min Li,Wenkai Zhang,Gang Shao,Hao Kan,Zhilong Song,Songman Xu,Haoxiong Yu,Shenglin Jiang,Jingting Luo,Huan Liu
Colloidal quantum dots (CQDs) are emerging as ideal building blocks for the development of sensitive and low-cost gas sensors because of their large surface area and solution processability. So far, the construction of CQD gas sensor is limited to lab-scale, batch-processing methods such as spin coating . Here, we demonstrated highly sensitive and fast-response CQD gas sensors through a room-temperature spray-coating route in ambient air. Unlike the spin-coating process, a porous film morphology could be achieved by the spray-coating of ultrasmall PbS CQDs (4.0 nm in diameter) on the alumina ceramic substrates , possibly explaining their superior gas-sensing performance. Moreover, we investigated the effect of the dispersing solvent on the spray-coated PbS CQD films and found that organic solvents with lower boiling point were preferred in producing porous and sensitive CQD films. The response of the optimal gas sensors toward 50 ppm of NO 2 at room temperature was high as 44, with response and recovery times short as 1 s and 28 s, respectively. The enhanced gas-sensing capabilities, coupled with the promise for mass production at room temperature, make the spray-coated CQD gas sensors very attractive in the future gas-sensing technology.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2026
·
IF 2.5
Junying Yu,Yahong Wang,Peng Ye,Luming Zhou,Yingrui Chen,Lin He,Rongli Gao,Chunlin Fu
Enhancing the power conversion efficiency of solar cells requires effective utilization of the full solar spectrum. In this work, we develop PbS/MAPbI 3 core-shell nanorod arrays that integrate the light-trapping and directional charge-transport benefits of nanorod architectures with the strong visible-light absorption of perovskites and the near-infrared response of PbS quantum dots (QDs). A key challenge lies in mitigating heterointerface defects, which we address by passivating the PbS QD surface with methylammonium iodide (MAI)—a strategy that simultaneously reduces surface defects and modulates perovskite crystallization. We identify the concentration of MAI-passivated PbS QDs as a critical parameter governing interfacial morphology, which in turn determines perovskite film quality, defect density, and charge dynamics. Systematic optimization over a concentration range of 40-100 mg/mL reveals that a concentration of 60 mg/mL yields a uniform and continuous QD interlayer. This optimal interlayer promotes high-quality MAPbI 3 growth, reduces defect density, and effectively suppresses non-radiative recombination—as confirmed by the minimized Urbach energy (0.102 eV) and maximized recombination resistance (20646 Ω). The champion device achieves a power conversion efficiency of 9.09%, with concurrent enhancements in open-circuit voltage and fill factor. Collectively, these results establish a clear relationship between processing conditions, interfacial structure, and device performance in core-shell nanorod solar cells, while elucidating how QD layer morphology governs perovskite crystallization and interfacial carrier dynamics.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiamin Wu,Qian Tian,Yi Liu,Maoping Xu,Shengxiang Gao,Anran Ma,Chuang Hou,Guoan Tai
Developing room-temperature gas sensors with ultrahigh sensitivity and rapid response to nitrogen dioxide (NO 2 ), a hazardous air pollutant, remains critically important yet challenging. Borophene, a two-dimensional (2D) elemental nanomaterial, exhibits promising sensing potential owing to its exceptional electronic conductivity and abundant active surface sites. However, pristine borophene suffers from limited response kinetics and diminished sensitivity at elevated NO 2 concentrations. Herein, we introduce a novel heterostructure composed of lead sulfide (PbS) nanoparticles decorated on α'-4H-borophene nanosheets, synthesized through a facile ultrasound-assisted assembly strategy. The resultant borophene-PbS composite demonstrates outstanding sensing performance, exhibiting a remarkable sensitivity of 1692 % at 75 ppm NO 2 , an ultrafast response (<10 s), and an exceptionally low detection limit of 20 ppb at ambient conditions. Comprehensive structural and mechanistic analyses reveal that synergistic interfacial coupling between borophene and PbS significantly enhances NO 2 adsorption and accelerates interfacial charge transfer dynamics. This work not only overcomes intrinsic limitations of pristine borophene but also establishes a scalable approach toward next-generation 2D-based gas sensors with superior sensitivity, selectivity and stability.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2017
·Vol. 75
·期 2
·533-546
·
IF 1.43
Hu Xueyan,Su Tingting,Li Ping,Wang Zhanyong
This study used benzoyl peroxide (BPO) as a cross-linking agent to modify the blends of poly(butylene succinate) (PBS) and poly(lactic acid) (PLA). The PBS/PLA blends with a ratio of 20/80 and added 1% BPO was chosen because of its favorable properties. The compatibility of PBS/PLA was improved after adding BPO. The addition of BPO also improved the crystallization and promoted the complete decomposition of PBS/PLA, respectively. The blends with BPO was degraded by proteinase K. The degradation rate of the blends reached 67% after 96 h degradation. The PLA was not degraded completely because of the crosslink between PBS and PLA.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 29
·e00804
·
IF 7.2
Yixin Jiang,Tieying Ma,Xiaowei Gu,Tian Jia,Yuanze Hong,Yilong Huang,Xuechao Yu
Infrared photodetectors are crucial for detection, identification, and analysis, making them of paramount importance in both military and civilian applications. Graphene-based photodetectors integrated with colloidal quantum dots (CQDs) show great promise in the infrared spectrum, however, challenges remain in optimizing their performance and scalability. In this work, we present an innovative approach for fabricating high-performance infrared photodetector arrays by inkjet printing of colloidal lead sulfide (PbS) QDs onto graphene-based field-effect transistors (FETs) arrays. The incorporation of inorganic ligands Na 3 AsS 4 significantly enhances the photodetector's responsivity up to 1276 A W −1 , which is nine times the responsivity of traditional ligand-functionalized devices. Additionally, the response time of the inorganic ligand device is 19 ms, two orders of magnitude faster than that of the EDT-functionalized device, due to the short-chain inorganic ligands significantly enhancing the charge transfer efficiency of the device. Furthermore, the inkjet printing technology is employed to enable precise deposition, thereby promoting the scalable fabrication of compact and high-resolution photodetector arrays. These findings highlight the potential of inkjet-printed QD–graphene photodetector arrays in infrared imaging and sensing applications, paving the way for large-scale fabrication of high-performance optoelectronic devices.
研究领域:
光电子学
·
纳米技术
·
红外成像
·
量子点器件
·
石墨烯电子学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiaoyu Zhang,Niuniu Zhang,Xiangxing Xu
Colloidal quantum dots (QDs), particularly lead sulfide (PbS) QDs, are attractive for optoelectronic applications due to their tunable bandgap and outstanding photoelectric properties. However, conventional PbS QD photodetectors are often limited to a single photoconductivity mode. In this work, we fabricate photodiode-type devices based on PbS QD homojunctions and demonstrate bias tunability across multiple photoresponse modes─especially from negative to positive photoconductivity. Systematic analysis reveals that the operating mode transitions from drift- to diffusion-dominated photoresponses as the bias increases. Field-effect transistor measurements further show that illumination not only enhances carrier concentration but also significantly boosts carrier mobility. QD size and surface ligands serve as additional control variables. These findings on photoresponse regulation provide a mechanistic foundation for designing multimodal photodetectors and advancing QD-based optoelectronic logic devices.
研究领域:
光电子学
·
纳米材料
·
量子点
·
光电探测器
·
半导体器件
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）