OPTICAL MATERIALS
·
2024
·
IF 3.8
Jinshui Duan,Ruijun Jia,Kangning Liu,Mingyang Yu,Quanjiang Lv,Shahid Hussain,Sameh M. Osman,Jun Dai,JunLin Liu,Chunxia Wu
Perovskite quantum dots (QDs) have garnered significant interest for their superior optical properties . Despite their attractive photovoltaic properties and chemical processing ability, the high defects density within QDs can result in the annihilation of luminescence. In this study, cesium trifluoroacetic acid (CsTFA) was used as the cesium source, replacing conventional cesium carbonate (Cs 2 CO 3 ) and introducing TFA ligands to improve the luminescence quality of QDs . As well as doping with Zn 2+ to enhance both the stability and luminescence quality of the quantum dot solution. The doped QDs exhibit the highest photoluminescence (PL) intensity, which is further enhanced by the perovskite QDs with TFA as a ligand. Furthermore, the PL spectra of CsPbBr 3 and TFA-CsPbBr 3 : Zn (10 %) QDs with the temperature changes have also been analyzed. The result reveals the relationship between excitons and phonons . Based on the result, Zn 2+ doped and TFA ligand induced perovskite QDs have the potential to serve as an optimal material.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Tong Luo,Xiaoliang Guo,Yuling Qiu,Daihui Zhang,Chuanwei Lu,Chunpeng Wang,Jifu Wang,Tongqi Yuan,Fuxiang Chu
Conductive pressure sensitive adhesives (PSA) used for wearable and smart electronic sensors have attracted a significant amount of attention recently. However, achieving multifunctional conductive PSA with the feature of temperature tolerance and sustainability via a convenient and environment-friendly approach still remains challenge. Herein, a novel cellulose-rosin based poly(esterimide) (PEI) was first prepared by esterification and imidization. Then, the cellulose-rosin based PEI was integrated with polymerizable deep eutectic solvents (PDES, 2-hydroxyethyl acrylate and triethanolamine as hydrogen bond donor, choline chloride as hydrogen bond receptor) and performed UV-induced polymerization for formation of the conductive PSA with dual network (DN). The DN structure and the existence of extensive hydrogen bonds endowed these cellulose-rosin based conductive PSA with excellent adhesion property (shear resistance more than 70 h, tack of 14.6 N and 180° peel strength of 148.1 N/m, are higher than that of some typical commercial PSA), exceptional UV-blocking, solvent-resistance (usable in low polar solvent) and temperature tolerance (perform well between −25 °C to 140 °C). Furthermore, these conductive PSA could be used as wearable sensor to monitor subtle movements and achieve real-time monitoring of interface adhesion states even under extreme environmental conditions. This work provides a green strategy for the next-generation of multifunctional PSA.
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2024
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IF 1.9
Yuting Yang,Zhen Dong,Guofeng Zhang,Huaqi Zhang,Yongbin Zou,Xue Hao,Zhiwen Ye
A series of newly structured two-tailed cationic surfactants were synthesized via a carbonyl amine condensation reaction aimed at reducing the bioaccumulation of conventional surfactants while maintaining their excellent surface properties. Long-chain alkyl amine compounds can be reversibly converted into charged surfactants through CO2/H2O treatment and an alkyl chain length of between C8 and C12. The structures were characterized by IR,1H NMR and 13C NMR. The main surface activity parameters of the surfactants, containing cmc, γcmc pC20, cmc/С20, Γm and Αmin, were determined. The switching properties of N’-alkyl-N, N-dimethylalkamidine bicarbonate and N, N-dimethyl-N-alkylamidine bicarbonate were demonstrated by investigating their conductivities in solution and carrying out their emulsification-emulsion-breaking experiment.
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Materials
·
2024
·Vol. 17
·期 11
·2563
·
IF 3.1
Qi Liu,Hang Li,Xiaoqian Wang,Jiazhen He,Xuemin Luo,Mingwei Wang,Jinfeng Liu,Yong Liu
Amidst the rapid advancements in the fields of photovoltaics and optoelectronic devices, CsPbBr3nanosheets (NSs) have emerged as a focal point of research due to their exceptional optical and electronic properties. This work explores the application potential of CsPbBr3NSs in photonic and catalytic domains. Utilizing an optimized hot-injection method and a ZnBr2-assisted in situ passivation strategy, we successfully synthesized CsPbBr3NSs with controlled dimensions and optical characteristics. Comprehensive characterization revealed that the nucleation environment and thickness significantly influenced the structure and optical performance of the materials. The results indicate that the optimized synthesis method enables control over the lateral dimensions of the nanoparticles, ranging from 9.1 ± 0.06 nm to 334.5 ± 4.40 nm, facilitating the tuning of the excitation wavelength from 460 nm (blue) to 510 nm (green). Further analyses involving photoresponse and electrochemical impedance spectroscopy demonstrated the substantial potential of these NSs in applications such as photocatalysis and energy conversion.
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Small Structures
·
2024
·Vol. 5
·期 7
·2300577
·
IF 13.9
Feiyu Diao,Qingye Zhang,Jiaju Wang,Wenshuang Liang,Federico Rosei,Xuyan Xue,Yiqian Wang
All-inorganic halide perovskites exhibit exceptional optical properties and are promising photoactive materials for optoelectronics. However, their stability remains a key challenge, exacerbated by a limited understanding of degradation mechanisms. Herein, in situ transmission electron microscopy (TEM) is used to investigate the effect of thickness on the structural stability of CsPbBr 3 nanobricks under electron beam irradiation. CsPbBr 3 nanobricks with different thicknesses have been prepared using a traditional hot-injection method, giving rise to a distinctive cubic structure. A modulated structure, caused by bromine vacancy ordering, has been observed in the thin nanobricks. The degradation behaviors of nanobricks are related to thickness-dependent bromine vacancy formation in the CsPbBr 3 lattice. More bromine vacancies exist in thin nanobricks than thick ones, resulting in a greater number of undercoordinated Pb atoms which accelerate irradiation-induced degradation. Decomposition products include Pb nanoparticles, which also demonstrate thickness-dependent characteristics. TEM images of Pb nanoparticles formed from thin nanobricks show evidence of irradiation-induced amorphization. In thicker nanobricks, Pb nanoparticle size increases with the duration of electron beam irradiation, while the remaining Cs atoms bond with Br atoms to form relatively stable CsBr nanoparticles. These results contribute to understanding of degradation mechanisms in cesium lead halide perovskites under electron beam irradiation.
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Materials
·
2025
·Vol. 18
·期 21
·4885
·
IF 3.2
Zahir Abdalla,Chengqi Liu,Shefiu Kareem,Xiaoqian Wang,Zisheng Tang,Yong Liu
Two-dimensional (2D) colloidal CsPbBr3nanosheets (NSs) possess size-dependent optoelectronic properties; however, conventional hot-injection methods often lack precise growth control and well-ordered superlattice self-assembly. Herein, we introduce a modified ligand-assisted hot-injection strategy that promotes direct precursor–ligand interactions prior to solvent mixing, thereby enabling highly controlled nanosheet superlattice growth. By adjusting the reaction temperature from 130 to 150 °C, we obtained rectangular nanosheets with monodisperse, well-defined thicknesses of 3.35 ± 0.05 nm and 4.05 ± 0.09 nm at 130 and 140 °C, respectively, both below the 7 nm exciton Bohr diameter, consistent with strong quantum confinement. The resulting superlattices exhibited sharp, tunable photoluminescence peaks at 462, 464, and 513 nm, with time-resolved PL revealing a clear size–lifetime correlation, where smaller lateral superlattices at 130 °C showed a short decay time of 8.65 ns, intermediate growth at 140 °C yielded 15.42 ns, and larger lateral superlattices at 150 °C reached 35.49 ns. Importantly, the modified synthesis facilitated the formation of ordered superlattices that preserved their intrinsic emission properties, underscoring their structural stability and scalability. These findings establish a direct link between ligand-mediated synthesis, reaction temperature, nanosheet dimensions, and optical performance, offering a pathway to high-quality perovskite NS superlattices for advanced optoelectronic applications such as light-emitting diodes and sensors.
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JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Weilong Qin,Xu Chen,Xiaowei Deng,Meng Wang,Dongyang Zhu,Jibin Zhang,Ying Liu,Maochen Jia,Xinjian Li,Wen Xu,Zhifeng Shi
White light-emitting diodes (WLEDs) have garnered significant attention due to their key applications in lighting and display technologies, especially in the development of single-component white-light-emitting materials. Herein, we synthesized Cs 3 TbCl 6 nanocrystals (NCs) with tunable white light emission by introducing Eu 3+ ions. The single-component white-light emission comprises blue, green, and red components, originating from self-trapped exciton, Tb 3+ , and Eu 3+ emissions, respectively. Through precisely controlled Eu 3+ doping, we achieve a high energy transfer efficiency of 48.3% from Tb 3+ to Eu 3+ , which is attributed to the enhanced spatial overlap between electrons and holes as revealed by spectroscopic analysis and density functional theory calculations. The fabricated WLED devices based on Cs 3 TbCl 6 :Eu 3+ NCs exhibit excellent performance with a half-life exceeding 330 h, Commission International de l’Eclairage (CIE) coordinates of (0.316, 0.330), and a high color rendering index (CRI) of 89.4. Furthermore, the excitation-dependent emissions enable effective anti-counterfeiting and information encryption functionalities. This study presents a robust ionic doping strategy for modulating energy transfer in single-component white light-emitting nanomaterials, offering promising potential for applications in lighting, display, and information security technologies.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhen-Ya Liu,Wei Zhao,Li-Ming Chen,Fei Ding,An-An Liu,Dai-Wen Pang
Narrow bandgap silver selenide (Ag2Se) is a promising candidate for noninvasive in vivo imaging in the long-wavelength region of the second near-infrared window (NIR-IIc, 1700–2000 nm), yet precise control over its size remains challenging due to ineffective regulation of nucleation and growth, largely constrained by its extremely low solubility product. Here, we reveal a growth bottleneck in the Ag2Se quantum dots (QDs) synthesis arising from rapid monomer depletion during nucleation. The sole use of strongly binding thiol ligands further confines the system to a thermodynamically metastable size regime, hindering the continuous growth required for precise spectral tuning. By employing a dual-ligand strategy combining strongly binding thiol ligands with labile oleate ligands, we modulate monomer supersaturation and the dynamic adsorption–desorption equilibrium on the nanocrystal surface, thereby suppressing nucleation to preserve sufficient monomer for subsequent monomer diffusion-limited growth. This approach yields size-tunable Ag2Se QDs with emission peaks extending into the NIR-IIc window. Furthermore, the synergistic passivation by zinc oleate ligands significantly improves the size dispersity and colloidal stability of large-sized Ag2Se QDs. Our in-depth investigation not only addresses challenges in size control of QDs exhibiting nonclassical growth but also highlights the transformative potential of low-toxicity, NIR-IIc-emissive Ag2Se QDs for optoelectronics and noninvasive deep-tissue imaging.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zhibin Xu,Zhiheng Xu,Sirui Zhu,Xuebin Zhang,Dandan Yang,Xiaobin Tang
Two-dimensional CsPbX 3 perovskite nanosheets serve as unique platforms for polarized emission modulation. However, the integrated control mechanism of bandgap engineering and polarized optical properties remains largely unexplored. In this study, we demonstrated a halogen gradient strategy using iodine-doped CsPbBr 3-x I x nanosheets with polymer encapsulation, enabling simultaneous band structure modification and optical anisotropy regulation. The iodine gradient enabled continuous tuning of the degree of polarization (up to 0.39) across a broad-spectrum range of 520–677 nm. Notably, radiation-induced polarized emission was observed in perovskite nanostructures under X-ray excitation, revealing directional transport behavior under high-energy stimulation. This work presents a detailed systematic investigation into X-ray-induced linearly polarized luminescence from perovskite nanosheets. The polarization-sensitive response detector exhibited enhanced current ratios, which can be attributed to iodine-induced defect suppression. This work not only advances the field of polarized optoelectronics but also establishes new opportunities for the detection of X-ray polarization response.
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JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Wenhui Zhao,Yuqiao Cheng,Yinhao Cao,Lijun Liu,Cheng Liang,Wenxiang Zhu,Zeyang Shan
1,3-dioctylimidazolium ionic liquids ((C8) 2 mimAc) with acetate anions was synthesized and characterized by 1 H NMR, FT-IR, and TGA. The effect of inorganic salt (NaCl, CaCl 2 , and MgCl 2 ) on their solution properties and interfacial activities were systematically investigated using surface tension, dynamic light scattering (DLS), oil–water interfacial tension, and contact angle. The results showed that the addition of NaCl and MgCl 2 can decrease the critical micellar concentration (cmc) values and surface tension at the cmc. However, the distribution of (C8) 2 mimAc molecules at the air–liquid interface is reduced, and the formation of aggregates in the aqueous solution is increased by CaCl 2 . Interfacial tension and contact angle tests showed that the ability of inorganic salts to enhance oil–water interfacial activity and wettability of (C8) 2 mimAc followed the order: NaCl < MgCl 2 < CaCl 2 , which is meaningful for the application of (C8) 2 mimAc in enhanced oil recovery.
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JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Yu-Ling Wang,Kang Zhou,Hai Yu,Zhiliang Jin,Fengqi Fan,Liping Wang,Ping Wen,Rui Dong,Mingjin Fan
Multifunctional additives are essential to achieve efficient lubrication in practical service. In this work, three novel ionic liquids (ILs) were designed and synthesized based on the traditional antioxidant molecule (3,5-Di-tert-butyl-4-hydroxyphenylpropionic acid). Not only the improvement of oxidation resistance and thermal stability, the strengthening of friction-reducing (decrease by 40 %), anti-wear properties (decrease by 80 %) and stability is more noteworthy when applied as the functional additive of base oil (PAO6). The electrostatic interaction between IL anions and cations and the balance of Van der Waal's forces is favorable for its unique interfacial self-assembly behavior. This work provides theoretical guidance for the design of multifunctional additives and the innovation of high-performance antioxidant lubricants.
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Frontiers in Chemistry
·
2018
·
IF 4.155
Zhang Feng,Xiao Changtao,Li Yunfei,Zhang Xin,Tang Jialun,Chang Shuai,Pei Qibing,Zhong Haizheng
Reprecipitation synthesis has been demonstrated to be a simple and convenient route to fabricate high quality perovskite quantum dots toward display applications, whereas the limited chemical yields (< 10%) and difficulty of purification limited its further application. In order to overcome this issue, we here report a modified emulsion synthesis by introducing phase transfer strategy, which achieving effective extraction of newly formed perovskite quantum dots into non-polar solvent and avoiding the degradation of perovskite quantum dots to a large extent. Based on this strategy, gram-scale CH3NH3PbBr3 quantum dots were fabricated in 10 mL (~0.02 mol/L) colloidal solution with chemical yields larger than 70%. The as fabricated CH3NH3PbBr3 quantum dots exhibit an emission peak of 453 nm and a full width at half maximum of only 14 nm. Moreover, electroluminescent devices based on blue emitting CH3NH3PbBr3 quantum dots were also explored with a maximum luminance of 32 cd/m2, showing potential applications in blue light emitting devices.
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