InfoMat
·
2023
·
IF 22.7
Peilin Liu,Shuaicheng Lu,Jing Liu,Bing Xia,Gaoyuan Yang,Mo Ke,Xuezhi Zhao,Junrui Yang,Yuxuan Liu,Ciyu Ge,Guijie Liang,Wei Chen,Xinzheng Lan,Jianbing Zhang,Liang Gao,Jiang Tang
Lead sulfide (PbS) colloidal quantum dot (CQD) photodiodes integrated with silicon-based readout integrated circuits (ROICs) offer a promising solution for the next-generation short-wave infrared (SWIR) imaging technology. Despite their potential, large-size CQD photodiodes pose a challenge due to high dark currents resulting from surface states on non-passivated (100) facets and trap states generated by CQD fusion. In this work, we present a novel approach to address this issue by introducing double-ended ligands that supplementally passivate (100) facets of halide-capped large-size CQDs, leading to suppressed bandtail states and reduced defect concentration. Our results demonstrate that the dark current density is highly suppressed by about an order of magnitude to 9.6 nA cm −2 at −10 mV, which is among the lowest reported for PbS CQD photodiodes. Furthermore, the performance of the photodiodes is exemplary, yielding an external quantum efficiency of 50.8% (which corresponds to a responsivity of 0.532 A W −1 ) and a specific detectivity of 2.5 × 10 12 Jones at 1300 nm. By integrating CQD photodiodes with CMOS ROICs, the CQD imager provides high-resolution (640 × 512) SWIR imaging for infrared penetration and material discrimination.
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TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Haolin Li,Fan Xu,Kun Cui,Bingyu Tian,Rui Dong,Mingjin Fan
Lubricating materials for highly reactive titanium alloys are not sufficiently abundant, limiting their wide practical applications. In this work, the tribological properties for various lubricants on titanium alloy surfaces are investigated, as well as their physicochemical and adsorption properties in terms of structural composition. The results indicated that high polarity, long alkyl chain length and small spatial site resistance will be positively correlated with the tribological properties. The FIB-TEM analysis further illustrates that the film-forming mechanism of strong polar adsorption and tribo-chemical reaction is vital to high-performance lubricants on titanium alloys. This work shows great instructive significance to investigate the tribological properties and interaction mechanisms on titanium alloy surfaces from the perspective of molecular design.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhaojun Wang,Shuntian Huang,Xinyu Zhao,Shujuan Yang,Keyang Mai,Wenqi Qin,Kaiyue Liu,Junhao Huang,Yuhong Feng,Jiacheng Li,Gaobo Yu
Significant challenges remain in designing sufficient viscoelasticity polysaccharide-based high internal phase Pickering emulsions (HIPPEs) as soft materials for 3D printing. Herein, taking advantage of the interfacial covalent bond interaction between modified alginate (Ugi-OA) dissolved in the aqueous phase and aminated silica nanoparticles (ASNs) dispersed in oil, HIPPEs with printability were obtained. Using multitechniques coupling a conventional rheometer with a quartz crystal microbalance with dissipation monitoring, the correlation between interfacial recognition coassembly on the molecular scale and the stability of whole bulk HIPPEs on the macroscopic scale can be clarified. The results showed that Ugi-OA/ASNs assemblies (NPSs) were strongly retargeted into the oil–water interface due to the specific Schiff base-binding between ASNs and Ugi-OA, further forming thicker and more rigid interfacial films on the microscopic scale compared with that of the Ugi-OA/SNs (bared silica nanoparticles) system. Meanwhile, flexible polysaccharides also formed a 3D network that suppressed the motion of the droplets and particles in the continuous phase, endowing the emulsion with appropriately viscoelasticity to manufacture a sophisticated “snowflake” architecture. In addition, this study opens a novel pathway for the construction of structured all-liquid systems by introducing an interfacial covalent recognition-mediated coassembly strategy, showing promising applications.
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Deqi Fan,Yi Lu,Xueling Xu,Yicheng Tang,Hao Zhang,Yan Mi,Xiaofei Yang
Elaborately designing multifunctional energy conversion materials is vital to promoting renewable energy conversion. Herein, we report a novel approach in which photocatalytic materials and photothermal components are embedded simultaneously into porous delignified wood to construct wood-based hybrid hydrogels for water decontamination, hydrogen generation and freshwater production. Well-designed all-in-one system elaborately interfaces hydrogen-evolving semiconductor CdS with MoSe 2 that functions as co-catalyst and also possesses photothermal effect to simultaneously drive the removal of pollutants, hydrogen production and solar steam generation with high efficiency. The multifunctional system demonstrates a hydrogen evolution rate of 9.7 mmol g –1 h −1 and a high solar evaporation rate of 1.92 kg m −2 h −1 with an energy conversion efficiency up to 90.7% under one sun illumination. The encapsulation of photothermal-assisted photocatalytic systems with hydrogels effectively prevents toxic volatile organic compounds (VOCs) from being evaporated without deteriorating the solar steam generation performance. This study provides new insights into the rational design of novel multifunctional materials for environmental remediation and energy sustainability.
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REACTIVE & FUNCTIONAL POLYMERS
·
2023
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IF 5.1
Liyang Zhao,Hongli Zhang,Gang Zou
Nonconventional luminogens, represented by clustering-triggered emission (CTE) materials, have attracted increasing attention owing to their unique intrinsic emission and promising applications. However, the influencing factors of clustering-triggered emission and gelation behavior remain poorly understood. Herein, a series of poly(thioether)s with different pendant groups were synthesized and their unique properties were studied. Owing to the similar molecular structure, all five poly(thioether)s exhibited visible photoluminescence , but the intensity varied when the pendant group or solvent changed, which could be attributed to different clustering degree between polymer chains. Moreover, poly(thioether)s with different pendant groups showed the diverse gelation behavior during polymerization process. The impact of pendant group on the clustering-triggered emission property and gelation behavior of poly(thioether) derivatives were investigated in detail, which might be of great fundamental value for the rational design of functional nonconventional luminogens for biological and medical applications.
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CHINESE JOURNAL OF CHEMISTRY
·
2023
·Vol. 41
·期 18
·2305-2310
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IF 5.4
Rongye Li,Yue Zhao,Min Lin,Jing Sun
Comprehensive Summary Great efforts have been lately devoted to fabricating well-defined nanostructures using crystallization-driven self-assembly (CDSA) strategy. The influence of self-assembly on crystallization is also of great interest. Here, a series of amphiphilic diblock copolypeptoids poly( N -allylglycine)- b -poly( N -octylglycine) modified with cysteamine hydrochloride ((PNAG- g -NH 2 )- b -PNOG) were synthesized by ring-opening polymerization (ROP) and post-polymerization functionalization. The diblock copolypeptoid is comprised of one hydrophobic crystalline PNOG block and one hydrophilic amorphous block, which can aggregate into nanostructured assemblies with soluble PNAG- g -NH 2 as the corona layer and PNOG as the inner core in aqueous solution. With a systematic study by differential scanning calorimetry (DSC) and wide-angle X-ray scattering (WAXS), we demonstrated that the self-assembly of the block copolymers strengthens the crystallization of the PNOG block.
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Materials Today Communications
·
2023
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IF 3.8
Yun Tang,Yuchao Zhang,Ben Liu,Xiaoqiang He,Hudie Yuan,Yalou Xin
Polymer encapsulation is regarded as an efficient strategy to enhance the stability of perovskite quantum dots (PQDs), and also endows the perovskites with advantages in mechanical properties and processibility. In this work, polymer encapsulation was achieved by in-situ synthesis of PQDs in polycaprolactone (PCL) polymer, which avoiding time-consuming process of blending polymer with PQDs. Moreover, besides of acting as encapsulation matrix, PCL in toluene could provide large nucleation sites for PQDs formation, resulting in the relatively smaller PQDs size and enhanced photoluminescence quantum yield (PLQY) with respect to the composites prepared by physical blending. Profiting from PCL encapsulation, the as-synthesized PQDs-PCL composites exhibited enhanced stability against UV light, water and heat. The strong interaction between PQDs and PCL in composites with high PCL concentration could endow them with more significantly improved PL stability under UV-light illumination and relatively better mechanical properties compared to the composites with high PQDs concentration. This work provides an efficient method to synthesize PQDs-polymer composites with enhanced PLQY and stability, which would promote practical applications of PQDs materials in the optoelectronic applications .
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Arabian Journal of Chemistry
·
2023
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IF 6
Ruifeng Liao,Liangliang Shi.,Yi Zhou,Chenyue Jia,Jiangtao Feng,Weinong Zhang,Junbo He
Four novel nonionic 1-alkylaminoglycerol Gemini surfactants, represented by m-s-m ( m = C 8 and C 12 , s = 3 and 4), were synthesized through a two-step reaction in high yields, and confirmed by 1 H NMR, 13 C NMR, and HRMS. The synthesized Gemini surfactants exhibited low CMC (1.41–5.25 mmol/L), excellent surface-tension-reducing ability (25.45–26.83 mN/m), and wetting ability on hydrophobic interface. Gemini surfactants in aqueous solutions were in stable nanoscale dispersion, and exhibited strong and long-lasting foaming ability and emulsifying abilities for benzene/water and triacylglyceride/water systems. Especially, 12 – 4-12 solution displayed excellent tolerance to wide pH range and high salinity. Biological evaluation demonstrated that these Gemini surfactants, except for 8 – 4-8 , showed significant antibacterial activities against Staphylococcus aureus and Escherichia coli at 25 and 50 µg/mL. Hence, these Gemini surfactants have the potential to be used in a varieties of fields as highly efficient agents.
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TALANTA
·
2023
·
IF 6.1
Nuo Duan,Yuting Chang,Wenhui Lv,Changxin Li,Chunxia Lu,Zhouping Wang,Shijia Wu
Herein, a SiO 2 @Ag NPs core/shell nanoparticles were synthesized to fabricate a surface-enhanced Raman spectroscopy (SERS) sensor for the simultaneous determination of histamine (HIS) and tyramine (TYR) based on specific aptamer recognition and ratiometric strategy. SiO 2 @Ag NPs with 4-thiosaminophenol (4-ATP) and Nile blue A (NBA) molecules were used as an internal standard (IS) and labeled with aptamers corresponding to HIS and TYR, respectively. Raman reporter molecules ROX and Cy5 labeled complementary DNA (cDNA) were then hybridized with aptamers to form rigid double-stranded DNA. After the HIS and TYR were captured by their aptamers, resulting in the dissociation of cDNA and separated from the SERS substrate. Therefore, the SERS signal intensity at 1503 cm −1 of ROX and 1358 cm −1 of Cy5 tagged on the terminal of cDNA decreased with the concentration of HIS and TYR increasing, while the SERS signal intensity at 1079 cm −1 of 4-APT and 592 cm −1 of NBA on the substrate remain stable. Thus, the concentrations of HIS and TYR can be determined by the I 1503 /I 1079 and I 1358 /I 592 values, respectively. This sensing strategy achieves a lower detection limit of 0.2 ng/mL for HIS and 0.05 ng/mL for TYR, respectively, demonstrating promising applications in sensitive detection of BAs in animal-derived foodstuff.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Qiangqiang Wang,Xuanyu Zhang,Lei Qian,Chaoyu Xiang
Perovskite quantum dot light-emitting diodes (QLEDs) are potential candidates for next-generation displays due to their high color purity and wide color gamut. Due to the strong electron-accepting ability of poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine] (PTAA), quantum dot (QD) films are prone to be charged, which leads to the imbalance of charge injection and the increase of nonradiative recombination, ultimately affecting the performance of the QLEDs. Here, we compared and studied two polymers, poly(methyl methacrylate) (PMMA) and poly(vinyl pyrrolidone) (PVP), as the hole interface buffer layers of QD films, which effectively reduced the defect density, suppressed nonradiative recombination, and greatly improved the efficiency and stability of QLEDs. The devices with PMMA achieved a maximum external quantum efficiency of 20.71%.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xingchen Xie,Ni Wang,Baolong Sun,Li Zhong,Lixiang He,Sridhar Komarneni,Wencheng Hu
Transition metal dichalcogenides (TMDs) as materials for aqueous zinc-ion batteries (ZIBs) have received a lot of interest because of their large theoretical capacity and unique layered structure. However, the sluggish kinetics and inferior cyclic stability limit the usefulness of ZIBs. In the present investigation, the interlayer spacing enlarged MoSe 2 hollow nanospheres comprised of nanosheets with ultrathin shells have been successfully synthesized through a combined strategy of template assistance and anion-exchange reaction. The hierarchical ultrathin nanosheets and hollow structure effectively suppress the agglomeration of pure nanosheets and ameliorate volume fluctuations induced by ion migration during (dis)charging/charging. The interlayer expansion provides good channels for the transport of Zn 2+ ions and speeds up the insertion/extraction of Zn 2+ . In addition, in-situ carbon modification can significantly improve electronic conductivity. Therefore, the electrode prepared from MoSe 2 hollow nanospheres with enlarged interlayer spacing not only exhibits outstanding cycle stability (capacity retention of 94.5% after 1600 cycles) but also exhibits high-rate capability (266.1 mA h g −1 at 0.1 A g −1 and 203.6 mA h g −1 at 3 A g −1 ). This work could provide new insights into the design of cathode using TMDs of hollow structure for Zn 2+ storage.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
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IF 4.4
Imtiaz Ahmad,Mohammed Abohashrh,Abdur Rahim,Sadia Ahmad,Tahir Muhmood,Hongli Wen
The substantial optical features of perovskite quantum dots (PQD) lead to rapid growth in the investigation of their surface and lattice doping for optoelectronic and biochemical sensor advancements. Herein, we have used the surface ligand crafting model of PQD by ammonia and its optimum response to recognise ammonia in the sensing cellulose paper. The PQD with acetyl amine and octanoic acid capped were synthesized and entrapped in zeolites imidazole framework to delay the instant quenching and envisaged response to ammonia with high sensitivity. The hybrid perovskite quantum dots and Zeolite imidazolate framework-8 (PQD@ZIF-8) materials were further immersed in cellulose paper for solid-state sensor fabrication for the detection of ammonia by naked-eye and a Xiaomi Note-5 mobile camera. The ammonia was measured with high sensitivity at ambient conditions, with a detection limit of 16 ppm and a linear detection range of 1 to 500 ppm. This research provides a new platform for designing sensor selectivity and sensitivity, which could be used to further develop fluorescent nanomaterials-based sensors for small molecule detection.
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