APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Jingjing Xu,Zongzhe Li,Ruike Zhou,Yufan Cai,Hong Wei,Zhiheng Cheng,Liyong Zou,Zezhou Liang,Biao Xiao
Pb (acac) 2 suppresses water-induced defects, accelerating growth kinetics. • Alternating epitaxy enables purification-free, atomic-level tuning of PbS CQDs. • Periodic absorption shifts synchronized with Pb/S-rich surface cycling. Narrow-bandgap lead sulfide (PbS) colloidal quantum dots (CQDs) are promising for high-performance short-wave infrared (SWIR) optoelectronics, yet achieving concurrent control over their size, bandgap, and uniformity remains challenging. Here, we present an alternating epitaxial growth strategy grounded in dynamic surface structural engineering. Using lead acetylacetonate (Pb(acac) 2 ) as a highly reactive precursor, this approach enables atomic-level tuning of PbS CQD size and bandgap via periodic precursor injections, eliminating intermediate purification steps. We observed in situ cyclic shifts in the absorption peak position, strictly synchronized with the injection cycles. Combined structural and theoretical analyses reveal that these shifts stem from dynamic surface lattice strain, triggering surface reconstruction. This mechanism originates from cyclic transitions between Pb-rich and S-rich surface chemistries. By leveraging it, our strategy redshifts the absorption edge of PbS CQDs to ∼1971 nm while yielding an exceptionally low Urbach energy of 15 meV, reflecting superior narrow-bandgap characteristics and minimal energetic disorder. This work provides a robust method for fabricating high-quality PbS CQDs and introduces a new in situ paradigm for probing colloidal nanocrystal growth, offering a pathway to advanced infrared devices. We construct a dynamic Pb-rich/S-rich surface environment via periodic precursor injection, and the cycles drive atomic-scale size expansion of the quantum dots, with the absorption edge ultimately redshifting to ∼1971 nm. This strategy enables precise regulation of narrow-gap PbS quantum dots, centered on the dynamic coupling between surface chemistry and lattice strain. Download: Download high-res image (118KB) Download: Download full-size image
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高影响因子
COLLOID AND POLYMER SCIENCE
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2025
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IF 2.3
Mao Wenqiang,Li Jiapeng,Wang Dongdong,Pan Yanxiong,Ji Xiangling,Jiang Wei
Hot melt adhesives are utilized in a variety of industries because to their solvent-free, strong adhesion and rapid curing. With the increasing awareness of environmental protection, biodegradable hot melt adhesives have received attention. Herein, chlorinated poly(propylene carbonate) (CPPC)/poly(butylene succinate) (PBS)/poly(lactic acid) (PLA) blends were prepared using diphenylmethane diisocyanate (MDI) as reactive compatibilizer. Thermogravimetric analysis (TGA) demonstrated that adding PLA improved the thermal stability of the blends. From rheological tests, the melt elasticity and viscosity of the blends at 170 ℃ were enhanced after PLA was added. The tensile strength of CPPC/PBS/PLA/MDI blends reached 47.9 MPa as 32 wt% of PLA was added. When PLA content was 16 wt%, the blends exhibited high adhesion strength (13.97 MPa), which was much higher than that of common commercial products. In addition, the enzymatic degradation tests showed that the blends had biodegradability. Therefore, CPPC/PBS/PLA/MDI blends have the potential to be used in biodegradable hot melt adhesives. Graphical CPPC/PBS/PLA/MDI blends with different PLA contents were prepared by in situ compatibilization. The biodegradable CPPC/PBS/PLA/MDI blends had good mechanical and adhesive properties.
研究领域:
材料科学
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高分子科学
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胶粘剂技术
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环境科学
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高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Rui Cheng,Shiqiang Hao,Jun Li,Hui Bai,Sen Xie,Yue Gong,Wei Liu,Jinsong Wu,Gangjian Tan,Xinfeng Tang
In this study, the thermoelectric properties of group IIIA element (Al, Ga, In) doped PbS are systematically investigated. Al shows a low solubility limit (<1 mol %) in PbS, whereas Ga and In are soluble up to 2 mol %. Both experimental results and theoretical calculations suggest that Ga or In doping introduces strong gap states in PbS, which are the physical origins of enhanced effective mass and Seebeck coefficients. Meanwhile, a subtle simulation of carrier-concentration-dependent mobilities under single Kane band model clearly reveals that Ga doping significantly lowers the deformation potential of n-type PbS, whereas In does not. This lower deformation potential yields higher electrical conductivities at the same doping levels. The weakened electron phonon coupling phenomenon by Ga doping in PbS is further verified by our first-principles calculations. The rare combination of large effective mass and low deformation potential in Ga-doped PbS contributes to a high ZT value of ∼0.9 at 723 K, ∼50% higher than that of Cl-doped PbS control sample.
研究领域:
材料科学
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热电学
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凝聚态物理
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半导体掺杂
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2026
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IF 19.9
Afei Zhang,Jianan Wang,Salman Ali,Gomaa Mohamed Gomaa Khalaf,Xinzhao Zhao,Michael Wang,Chris Cheng,Jianbing Zhang,Kun Xu,Li Wang,Hsien-Yi Hsu,Haisheng Song,Mingyu Li
Efficient narrow-bandgap PbS quantum dot (QD) solar cells are promising candidates for bottom subcells in multi-junction tandem photovoltaics. However, solution-phase ligand exchange inevitably disrupts surface stoichiometry by introducing sulfur vacancies and excess lead iodide (PbI 2 ), which could act as non-radiative recombination sites and ion migration pathways. Herein, we develop an in situ sulfur-supplementation strategy utilizing N,N -Diphenylthiourea (DPTU). In the butylamine-mediated alkaline environment, DPTU releases sulfide ions that spontaneously repair sulfur vacancies and scavenge excess PbI 2 . Driven by the significant difference in solubility product constants between PbS and PbI 2 in N,N -Dimethylformamide, this process produces stoichiometric PbS ink with suppressed defect density. Combined with vacuum-assisted annealing, the 0.95 eV PbS QD devices achieve a record efficiency of 14.34% and a silicon-filtered efficiency of 1.56%, with excellent near-infrared photodetector performance and aging stability. Furthermore, optimized PbS devices contributed additional efficiencies of 6.37%, 2.56%, and 2.22% beneath 1.77, 1.26, and 1.77/1.26 eV perovskite filters, respectively. This work offers a robust in situ bulk passivation strategy to suppress vacancy defects and ion migration in PbS QD photovoltaics, paving the way for their application in high-performance tandem solar cells.
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高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Huashan Wang,Kaiyue Liu,Xing Chen,Meiyi Wang
A series of biodegradable copolyester of poly (butylene succinate-co-butylene malate) (P (BS-co-BM)) bearing hydroxyl groups were prepared by one-pot synthetic strategy without hydroxy-protection. The structure and properties of the P (BS-co-BM) were characterized by nuclear magnetic resonance ( 1 H NMR), thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), polarized optical microscope (POM), contact angle tester and enzymatic degradation. The results showed that the P (BS-co-BM) manifested excellent thermal properties. The glass transition temperature (T g ) of the P (BS-co-BM) increased with malic acid units added, the crystallizability temperature (T c ) decreased from 72.6 °C to 21.7 °C, and the melting point temperature (T m ) decreased from 117.9 °C to 82.4 °C. The crystallization rate of poly(butylene succinate) (PBS) segment within P (BS-co-BM) was improved by the introduction of malic acid. The enzymatic degradation rate increased with hydrophilicity of the copolyester improving.
研究领域:
材料科学
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高分子化学
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生物降解材料
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热分析
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PubMed
高影响因子
RSC Advances
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2018
·Vol. 8
·期 26
·14722-14731
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IF 2.936
Jiaxiang Qin,Limiao Lin,Shuanjin Wang,Shuxian Ye,Weikeng Luo,Min Xiao,Dongmei Han,Yuezhong Meng
In order to decrease the brittle–toughness transition temperature and increase the mechanical strength of poly(propylene carbonate) (PPC), a series of multiblock copolymers of poly(propylene carbonate)-multiblock-poly(butylene succinate) (PPC-mb-PBS) are designed and synthesized. 1H-NMR, DOSY and GPC results demonstrate the successful synthesis of PPC-mb-PBSs with designed multiblock sequence. The thermal, crystalline and mechanical properties of these PPC-mb-PBSs are evaluated by DSC, TGA, POM, tensile and tearing testing. Experiment results demonstrate that crystallinity, thermal and mechanical properties of PPC-mb-PBSs can be readily modulated by changing the composition and block length of PPC and PBS moieties. It is found that all the prepared PPC-mb-PBSs are semi-crystalline polymers with a melting temperature at 93–109 °C and a Tg at around −40 °C. Both crystallization rate and crystallinity of the multiblock copolymers increase with increasing both PBS content and PBS block length. As a consequent, the tensile strength increases with increasing PBS/PPC block ratios at room and lower temperatures. In conclusion, the amorphous PBS phase in the block copolymers acts as soft segment, endowing PPC-mb-PBS copolymers with much better flexibility than PPC at low temperature of 273 K when PPC segments are frozen.
研究领域:
材料科学
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高分子化学
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2014
·Vol. 25
·期 7
·3016-3022
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IF 1.966
Tu Yongguang,Wu Jihuai,Lan Zhang,Lin Yibing,Liu Qin,Lin Bingcheng,Liu Guozhang
This paper reports the optimization of the TiO 2 photoanode and the fabrication of bifacial illuminated PbS quantum dot-sensitized solar cells (QDSSCs) with translucent CuS counter electrodes. TiO 2 photoanode is prepared by introducing a compact TiO 2 layer between FTO substrate and TiO 2 film with titanium diisopropoxide bis(acetylacetonate) in 1-butanol and post-treatment with TiCl 4 aqueous solution; then, PbS quantum dots (QDs) are deposited on the surface of TiO 2 film by successive ionic layer adsorption and reaction method; also, by means of control of the TiO 2 surface charge, QD density of TiO 2 film is improved by adding triethanolamine into the cationic precursor solution. Using this optimized TiO 2 photoanode and a translucent CuS counter electrode, a bifacial illuminated PbS QDSSC is fabricated. The preparation conditions are optimized and the surface morphology and electrochemical properties of TiO 2 photoanodes are characterized. The bifacial illuminated PbS QDSSC achieves a power conversion efficiency of 2.16 %, which is increased by 48.97 % compared with the single illuminated QDSSC.
研究领域:
材料科学
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能源研究
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DOI
高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Xiaotao Liu,Yuexia Feng,Jian Lu,Jun Wu,Brian J. Boman
Microplastics can harm marine organisms by adsorbing contaminants while aging of microplastics in seawater might induce new risks. This study evaluated the effects of bio-aging on the benzo(a)pyrene adsorption and desorption of petroleum-based degradable PBAT/PBS microplastics in seawater. The surface functional groups of PBAT/PBS microplastics treated with 36 months of bio-aging in seawater (A-PBAT 36M /A-PBS 36M ) significantly increased the O/C ratio (67/61%) and -C=O content compared to virgin PBAT/PBS (V-PBAT/V-PBS). The maximum adsorption capacity of benzo(a)pyrene on V-PBAT/V-PBS in seawater was 213.1/213.6 μg g -1 , whereas significant higher adsorption capacity of 258.0 μg g −1 and 246.3 μg g −1 were observed for A-PBAT 36M and A-PBS 36M , respectively. There was no significant difference in the adsorption of benzo(a)pyrene on PE under different bio-aging times. Bio-aging marginally reduced the potential risk of PBAT due to lower desorption capacity of A-PBAT 36M . Density flooding theory indicated that A-PBAT 36M -benzo(a)pyrene binds were dominated by van der Waals, π-π stacking, and C-H-π/O-H-π interactions, while A-PBS 36M -benzo(a)pyrene binds were dominated by van der Waals and C-H-π/O-H-π interactions. The binding energy of A-PBAT 36M /A-PBS 36M to benzo(a)pyrene decreased to -31.52/-25.87 kcal mol -1 , confirming stronger adsorption than V-PBAT/V-PBS. The results of the study provide new insights into the environmental behavior of petroleum-based degradable plastics in the marine environment, especially the long-term microbial aging process.
研究领域:
环境科学
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海洋污染
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高分子化学
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生态毒理学
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吸附过程
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高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Xiaobin Zhan,Xuning Zhang,Zhiyong Liu,Chen Chen,Lingxian Kong,Shulan Jiang,Shuang Xi,Guanglan Liao,Xingyue Liu
All-inorganic CsPbCl3 perovskite in ultraviolet (UV) detection is drawing increasing interest owing to its UV-matchable optical band gap, ultrahigh UV stability, and superior inherent optoelectronic properties. Almost all of the reported CsPbCl3 photodetectors employ CsPbCl3 nano- or microstructures as sensitive components, while CsPbCl3 polycrystalline film-based self-powered photodetectors are rarely studied on account of the terrible precursor solubility. Herein, a novel sequential vapor-deposition technique is demonstrated to fabricate CsPbCl3 polycrystalline film for the first time. High-quality CsPbCl3 films with excellent optical, electronic, and morphological features are obtained. A self-powered photodetector based on the CsPbCl3 film is constructed without any charge transport layer, showing a high UV detection performance. A thin p-type PbS buffer layer is further introduced to passivate the surface defects of the CsPbCl3 layer and decrease the interfacial energy barrier by forming a type-II heterojunction, contributing to a faster hole extraction rate and a suppressed dark current level. The best-performing device achieves an ultrafast response time of 1.92 μs, an ultrahigh on/off ratio of 2.22 × 105, and a responsivity of 0.22 A/W upon 375 nm UV illumination at 0 V bias. This comprehensive performance is the best among all of the CsPbCl3 photodetectors reported to date. The as-prepared photodetectors also present an eminent UV irradiation and long-term durability in ambient air. Furthermore, a large-area and uniform 625-pixel UV image sensor is fabricated and attains a prominent imaging capability. Our work opens a new avenue for the scalable production of CsPbCl3-based optoelectronics.
研究领域:
材料科学
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光电子学
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高影响因子
ACS Applied Materials & Interfaces
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2017
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IF 7.504
Yang Liu,Xin Gu,Wen Qi,Hong Zhu,Hao Shan,Wenlong Chen,Peng Tao,Chengyi Song,Wen Shang,Tao Deng,Jianbo Wu
Construction of a metal–semiconductor heterojunction is a promising method to improve heterogeneous photocatalysis for various reactions. Although the structure and photocatalytic performance of such a catalyst system have been extensively studied, few reports have demonstrated the effect of interface orientation at the metal–semiconductor junction on junction-barrier bending and the electronic transport properties. Here, we construct a Pt/PbS heterojunction, in which Pt nanoparticles are used as highly active catalysts and PbS nanocrystals (NCs) with well-controlled shapes are used as light-harvesting supports. Experimental results show that the photoelectrocatalytic activities of the Pt/PbS catalyst are strongly dependent on the contacting facets of PbS at the junction. Pt/octahedral PbS NCs with exposed PbS(111) facets show the highest photoinduced enhancement of hydrogen evolution reaction activity, which is ∼14.38 times higher than that of the ones with only PbS(100) facets (Pt/cubic PbS NCs). This enhancement can further be rationalized by the different energy barriers of the Pt/PbS Schottky junction due to the specific band structure and electron affinity, which is also confirmed by the calculations based on density functional theory. Therefore, controlling the contacting interfaces of a metal/semiconductor material may offer an effective approach to form the desired heterojunction for optimization of the catalytic performance.
研究领域:
材料科学
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催化化学
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Yichen Xing,Xiaoxiao Chen,Boxing Jin,Piaopiao Chen,Chaobiao Huang,Zhigang Jin
Kanamycin (Kana) is widely used as a veterinary medicine and its abuse causes a serious threat to human health, raising the urgent demand for detection of residual Kana in animal-derived food with high specificity and sensitivity. Here, we developed a photoelectrochemical (PEC) biosensor for rapid quantification of Kana, with lead sulfide quantum dots/titanium dioxide nanoparticles (PbS QDs/TiO2 NPs) as a photosensitive composite, a Kana-specific DNA aptamer as a functional sensor, and ruthenium(III) hexaammine (Ru(NH3)63+) as a signal booster. To prepare the PEC aptasensor, TiO2 NPs, PbS QDs, and polyethyleneimine (PEI) were respectively used to modify the indium tin oxide electrode, and then the amine-terminated aptamer probe was connected to the PEI via glutaraldehyde. Finally, Ru(NH3)63+ was attached on the surface of the aptamer to increase the photocurrent intensity. When Kana binds competitively with Ru(NH3)63+ to the aptamer immobilized on the surface of the aptasensor, Ru(NH3)63+ will be released from the aptamer, resulting in a decrease of the photocurrent signal. This PEC aptasensor exhibits a good linear relationship between the photocurrent shift and the logarithm of Kana concentration within the range of 1.0–300.0 nmol L–1, and the detection limit is 0.161 nmol L–1. Importantly, the PEC aptasensor presented good detection selectivity owing to specific interaction with Kana and was successfully implemented to quantify Kana in honey and milk, suggesting that the PEC aptasensor has the potential of rapid detection of residual Kana in animal-derived foods.
研究领域:
食品安全检测
·
生物传感技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yikai Wang,Sen Li,Ruofeng Liu,Jianbing Zhang,Jing Liu,Jiajun Luo,Jiang Tang
Room-temperature uncooled infrared photodetectors based on lead sulfide (PbS) offer significant potential for applications in the military, environmental, and automotive fields. While chemical bath deposition (CBD) offers cost and scalability advantages, inevitable oxygen doping and mandatory high-temperature sensitization impose fundamental limitations on device performance and integration. To address these challenges, this study reports an in situ antimony (Sb) doping strategy that enables the one-step growth of high-quality PbS films at room temperature. The introduced Sb dopant acts as a “sacrificial anode” to passivate the surface and suppress oxygen incorporation, which refers to the metallic Sb preferentially reacting with dissolved oxygen species, thereby “sacrificing” itself to protect the Pb2+ and S2– ions from oxidation and preventing oxygen inclusion in the PbS lattice, thereby drastically reducing dark current. Meanwhile, it generates n-type PbS domains, spontaneously forming built-in microscale PN junctions with the p-type matrix to facilitate efficient charge separation. Consequently, the optimized Sb-doped PbS photodetector exhibits a superior performance with a low dark current of 0.21 mA at 1 V, a fast average response time of 39.25 μs, and a high specific detectivity of 5.36 × 1010 Jones at 2.6 μm, which is comparable to mainstream commercial uncooled devices. This in situ doping approach not only delivers a superior PbS photodetector but also pioneers a general pathway for engineering complex optoelectronic structures in solution-processed semiconductors.
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高影响因子
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