ACS Nano
·
2025
·
IF 16
Yutian Lei,Yakun Shi,Ping Li,Jing Li,Wenqing Zhang,Si-Yang Liu,Yuzhi Xu,Zhaofan Luo,Xing Han,Yanfei Zhang,Jianhe Guo,Zong Dai
The reliable application of surface-enhanced Raman scattering (SERS) in bioanalysis is critically constrained by inherent trade-offs among sensitivity, chemical stability, and signal homogeneity of conventional substrate materials. Although silver–gold core–shell nanocubes (Ag@Au NCs) stand out for their high SERS activity and improved stability, preparing complete and uniform Ag@Au NCs remains challenging due to galvanic replacement-induced Ag core etching. To address this problem, this work reveals three distinct growth modes during Au shell deposition and proposes a size-determined growth rule to guide well-preserved Ag@Au NCs synthesis. We identified that larger Ag nanocubes (Ag NCs) with fewer unpassivated {111} facets preferentially form well-preserved Ag@Au NCs through layer epitaxial growth─an exclusive mode enabling intact ultrathin Au shells without Ag core etching. The resulting Ag@Au NCs exhibit exceptional batch-to-batch consistency and retain the high SERS activity of pristine Ag NCs, while achieving prolonged chemical stability (>180 days). Benefiting from their uniform morphology, these NCs can be assembled into highly ordered two-dimensional substrates with superior signal reproducibility (RSD = 4.96%) and plasmon activity (Raman enhancement factor >107). By integrating this substrate with a tetrahedral DNA-based detection method, a portable SERS biosensor cartridge was developed for multiplexed miRNA profiling in human plasma. Leveraging the superior performance, this platform demonstrates compelling potential for reliable cervical cancer diagnosis and staging. The modular cartridge design also makes it a versatile platform for diverse biomedical applications.
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Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 47
·40842-40849
·
IF 9.5
Yumeng Hu,Yulin Yao,Zhenheng Diao,De Sun,Yuanyuan Dong
The catalytic performance of TS-1 zeolites in selective oxidation reactions is strongly influenced by both the TiO6 concentration and specific surface area. However, simultaneously optimizing these two critical factors remains a significant challenge. Herein, a biuret-assisted hydrothermal synthesis strategy was developed to fabricate hierarchical TS-1 zeolites with high TiO6 concentration and enhanced specific surface area. The interaction between the amide groups of biuret and Ti monomers promoted the formation of TiO6 during crystallization, while the confinement effect of biuret facilitated the construction of mesopores. The resulting hierarchical TS-1 exhibited good catalytic activity and stability towards 1-hexene epoxidation and oxidative desulfurization reactions, where the conversion was 1.41 and 3.36 times higher than that of conventional TS-1, respectively. This work provides a facile approach for designing high-performance TS-1 catalysts by dual regulation of active sites and porosity.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jian Ao,Lingjun Bu,Kunting Xie,Yangtao Wu,Jiaxin Xiao,Shiqing Zhou
Aggregation of long-chain quaternary ammonium compounds (LC-QACs) into aggregates (e.g., micelles) during material modification often limits their grafting efficiency in porous adsorbents like powdered activated carbon (PAC), thereby constraining performance in anionic pollutant removal. Herein, we report a supramolecular strategy that employs β-cyclodextrin (β-CD) to suppress CTAB aggregation, enabling monomeric diffusion and enhanced CTAB loading within PAC micropores. The resulting β-CD/CTAB–PAC composite achieves a high perchlorate (ClO 4 − ) adsorption capacity of 211 mg g −1 , significantly surpassing the conventional CTAB-modified PAC (87 mg g −1 ), along with remarkable selectivity (distribution coefficient > 10× higher than competing anions), stability (<8% leaching in 10-day immersion), and regenerability (>91% capacity retention over 6 cycles). Fixed-bed column tests validated its practical efficacy, treating >5400 bed volumes of contaminated water (500 μg L −1 ) to below the drinking standard of 70 μg L −1 . Furthermore, density functional theory calculations attribute the high selectivity to the low hydration energy of ClO 4 − . Its sparse hydration shell results in a lower energy penalty for desolvation, enabling a more direct and stronger electrostatic interaction with the quaternary ammonium sites compared to the heavily hydrated competing anions. Overall, this aggregation-suppression approach provides a generalizable route for optimizing LC-QAC-based functionalization of porous materials.
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Light-Science & Applications
·
2026
·Vol. 15
·期 1
·151
·
IF 24
Cui Yuhang,Zhu Danlei,Chen Jiawei,Dong Shuyue,Cheng Yuanzhuang,Liu Xiangyu,Yan Xinghua,Jin Zicong,Duan Lian,Xu Jian,Ma Dongxin
Perovskite quantum dot light-emitting diodes (QLEDs) offer superior efficiency and high colour purity, making them promising candidates for next-generation lighting and display technologies. However, fabricating the emissive perovskite quantum dot (QD) layer typically requires a protective atmosphere due to its air sensitivity, thereby increasing production costs and limiting industrial scalability. Here, we propose an ion-pair pinning strategy by using tetraalkylammonium triflate (NR 4 OTf) to enable ambient-air processing of formamidinium lead bromide (FAPbBr 3 ) QD films. The trifluoromethanesulfonic acid anions (OTf − ) hydrogen bond with FA + , inhibiting its detachment and passivating the uncoordinated Pb 2+ , while the tetraalkylammonium cations (NR 4 + ) serve as X-type ligands to inhibit deprotonation. This dual ion-pair pinning effect stabilises the QD lattice and provides surface resistance to moisture and oxygen, thereby improving the uniformity, stability, and optoelectronic performance of air-processed QD films. The as-constructed air-processed QLED achieves a high external quantum efficiency (EQE) of 21.3% and a peak luminance of over 3 × 10 4 cd m −2 at 529 nm with Rec. 2020 compliance (EQE of 23.9% and luminance of over 8 × 10 4 cd m −2 for the N 2 -processed QLED). Our work eliminates the reliance on inert gas protection in perovskite QLED fabrication, laying a foundation for their low-cost, large-scale manufacturing and expansion into diversified applications.
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Nature Communications
·
2026
·
IF 18.1
Guo Ning,He Ke,Li Hui,Li Tianchen,Li Fengmian,Feng Jiangang,He Zhiyuan,Jiang Lei,Wu Yuchen
The facet-selective growth of shells on green InP-based quantum dots result in their inferior electron confinement capabilities, posing a challenge for the realization of completely cadmium-free quantum dot light-emitting diode displays. Here, we develop a surface energy homogenization strategy based on ligand adsorption using n-octylamine and diphenylphosphine selenide, effectively suppressing selective growth of ZnSe on the InP (111) facet, resulting in strongly electron-confined InP/ZnSe/ZnS quantum dots with a quantum yield exceeding 92% and a full-width at half-maximum of 35 nm. The resulting quantum dot light-emitting diodes achieve a peak external quantum efficiency of 23.50% and a luminance exceeding 1.4 × 10 5 cd m -2 , with a 107.5-fold increase in device lifetime. Utilized asymmetric wettability-mediated assembly strategy, we achieved quantum dot arrays with an impressive resolution of 8460 PPI. Furthermore, integrating the quantum dots into an active-matrix LED display, we successfully demonstrate the display of both static and dynamic images.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Yiting Han,Yueyang Xu,Liming Kong,Guojun Shi,Yongping Zeng
Metal-organic frameworks (MOFs) have garnered significant attention in adsorption desulfurization due to their high density of adsorption sites and permanent porosity. However, despite the abundant adsorption sites in Zr-based MOF-808, its relatively large pore channels and volumes may limit the adsorption efficiency for smaller molecules such as thiophene. Incorporating room-temperature ionic liquids (rILs) into MOF structures offers a promising strategy to address a key limitation of rILs-their high viscosity at ambient conditions, which often restricts mass transfer rates during liquid-liquid extraction. In this study, an IL-modified MOF-808 was synthesized to assess its performance in desulfurization. Characterization results confirmed that the rILs successfully infiltrated the MOF-808 pores without changing its framework integrity. Adsorption properties for thiophene in ILs/MOF-808 composites were investigated through Grand Canonical Monte Carlo (GCMC) simulations alongside experimental adsorption measurements conducted at 298 K. Further Monte Carlo (MC) simulations demonstrated that the presence of ILs enhanced the affinity for thiophene and increased the number of accessible adsorption sites within the composite. The adsorption capacity of ILs/MOF-808–20 remained stable over four adsorption-regeneration cycles using n-octane as the solvent, providing a potentially feasible solution for deep desulfurization.
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Food Chemistry-X
·
2026
·
IF 9.2
Hongyu Chen,Ronggang Jiang,Huimin An,Hao Xu,Xingchang Ou,Kuofei Wang,Yuan Chen,Youcang Jiang,Shi Li,Jianan Huang,Zhonghua Liu
Jasmine green tea (JGT), a distinctive Chinese tea product, derives its unique aroma via the adsorption of volatiles from jasmine flowers onto green tea-base tea (GBT). To identify the key odor-active volatiles in JGT, sensomics and chemometrics were employed, with GBT as the control. Sensory evaluation showed that GBT possesses a clean, fresh, and tender aroma, whereas JGT is characterized by a jasmine-like and refreshing scent. 35 and 31 candidate key odor-active compounds were identified in GBT and JGT, respectively, using aroma extract dilution analysis (FD > 16), and odor activity value analysis (OAV > 1). Aroma recombination, omission, and addition tests confirmed 13 key odor-active volatiles in JGT. Among these, α -farnesene and methyl salicylate were found to be the primary contributors to the jasmine-like and refreshing aromas, respectively. This study provides a theoretical reference for deeply understanding the molecular basis of JGT's aroma characteristics.
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JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Siwei Yan,Kezhen Qian,Dezhen Chen
The catalytic conversion of plastic waste is often complicated by additives. This study systematically investigates the influence of nonylphenol, a common oxygenated additive, on the catalytic performance of HY (FAU-type) and HZSM-5 (MFI-type) zeolites using high-density polyethylene (HDPE) and n -octane. The research revealed that nonylphenol exhibits a dual role: it provides an initial activity enhancement via bimolecular hydride transfer but more significantly acts as a potent coke precursor, driving rapid deactivation through pore-mouth blockage. Although nonylphenol accelerated deactivation, it did not alter the fundamental cracking pathway of n -octane on either zeolite. There are significant differences in deactivation behavior and selectivity trends between HDPE raw materials and n -octane model compounds. This discrepancy reveals the limitations of using n -octane as models to predict catalyst behavior in polyethylene catalytic cracking.
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Yuqin Su,Hengyang Xiang,Kun Zhang,Ying Zhou,Si Lan,Ruifeng Lu,Haibo Zeng
Perovskite quantum dots (PQDs) show promising potential in the optoelectronic field, but their commercial application is limited by the scalability in laboratory scale and complicated synthesis in an inert atmosphere, especially in I-based red-emission PQDs. The PQDs are disturbed by the performance decrease in the scalable synthesis caused by the trap states from weakly-bonded ligand loss and uneven nucleation/growth from the complicated injection process. Here, a 100-fold scalable (800 mL) and gram-level (2.19 g) synthesis of CsPbI 3 pure-red PQDs is achieved in ambient air. This is realized by a strongly-coordinated dual-ligand strategy with phosphorus-oxygen groups to interact strongly with Pb 2+ and protect PQDs from moisture/oxygen, ensuring the ambient air scalable synthesis. The 100-fold scaled-up PQDs show no significant emission shift or broadening (ΔPL = 0.7 nm, ΔFWHM = 0.8 nm) and remain over 80% PLQY. Also, pure-red light-emitting diode (LED) based on the scalable PQDs reserves 86.3% EQE of LEDs based on small-scale PQDs, showing the excellent batch consistency and commercial potential of PQDs.
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Nature Photonics
·
2026
·
IF 32.9
Cao Wei,Tian Sen,Zhong Chao,Qiu Li,Zeng Pan,Chen Zhiming,Zhang Xiancheng,Liu Haitao,Liu Kaitao,Li Jian,Sun Tao,Ning Pingfan,Zhang Delin,Wang Wenhong,Jiang Yong,Cao An,Li Liang,Liu Dilong,Nie Zhihong,Yang Fan,Li Fushan,Li Yue
High pixel resolution is critical for next-generation quantum-dot light-emitting diode (QLED) display technologies. Although advances in quantum-dot patterning have improved resolution, the reduction in pixel size often degrades emission efficiency and pattern uniformity. Here we develop a nanoimprint strategy using nanohole-array moulds to fabricate nano-QLEDs via capillary action-induced self-assembly of quantum dots. We realize pixels as small as sub-100 nm with ultrahigh pixel resolution up to 169,333 pixels per inch over an electroluminescent area of 4 mm 2 . Benefiting from the closely packed light-emitting quantum-dot monolayers, our nano-QLEDs show minimal performance degradation upon reducing the pixel size. Notably, the smallest red, green and blue nano-QLEDs maintain average external quantum efficiencies of 17.0%, 10.5% and 5.7%, respectively. We also demonstrate fabrication on flexible substrates as well as an active-matrix display by imprinting micro-QLEDs on a thin-film-transistor backplane, showing images and videos with a resolution of 100 pixels × 180 pixels. This work provides a powerful method for fabricating ultrahigh-resolution nano-QLED arrays with high external quantum efficiency for next-generation displays.
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Xudong Jiang,Jie Li,Zunxian Yang,Yue Chen,Luxi Yuan,Wenxin Tang,Yuting Bai,Jiajie Hong,Benfang Liu,Zheyu Zhou,Runsen Yu,Wenxin Zhang,Shangwei Ye,Zhiqian Wei,Zhezhou Fang,Jinzhu Gao,Zhiyu Yuan,Shunchang Cheng,Yuhan Meng,Zhiqi Lin,Tailiang Guo,Zhenzhen Weng,Yongyi Chen
As display technologies mature, there is a growing demand for displays that offer superior visual quality. However, the development of high-resolution fabrication processes that are low-cost, simple, and scalable remains a significant challenge. Currently, established techniques like photolithography and inkjet printing face specific challenges. For instance, photolithography inevitably causes film damage during steps such as resist removal and etching, while inkjet printing is constrained by nozzle size and the coffee-ring effect, limiting further resolution improvements. This study employs an indirect transfer printing method, which utilizes a stamp fabricated via a two-step molding process. This stamp exhibits excellent solvent resistance, allowing it to define the pattern of the polymethyl methacrylate (PMMA) insulating layer and thereby indirectly achieve the patterning of the quantum dots. Additionally, a layer of PDMS is incorporated beneath the UV-adhesive stamp to enhance its overall elasticity, ensuring conformal contact with the target substrate during the transfer printing process. Compared to existing techniques for transferring insulating layers, our method significantly streamlines the fabrication workflow while maintaining high pattern fidelity and transfer success rates. Using this approach, we successfully fabricated green high-resolution devices with a resolution exceeding 6000 PPI and a maximum active area of 1 inch. This work provides a viable strategy and paves the way for high-resolution device fabrication.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Wanying Zhang,Kaihuai Zhuo,Jie Chen,Tongtong Wang,Xuanyang He,Mengjie Li,Weilin Gao,Yiran Zhao,Xue Yang,Zhuoyin Peng,Xiaoyu Zhang,Yingwei Wang,Keqiang Chen,Guogang Li
Surface ligands are crucial for perovskite quantum dot (PQD) optoelectronics. However, long alkyl chains limit charge transport, while short chains destabilize their soft lattice, presenting a stability–mobility dilemma. Moreover, surface-bound protonated primary amines are susceptible to deprotonation, accelerating performance decay and structural collapse. In this work, we introduced tetrabutylphosphonium bromide (TBPB) as a surface passivation ligand to overcome these limitations. TBPB combines minimal molecular polarity—enabling a short chain for superior charge transport—with a fully coordinated phosphonium center that resists deprotonation and passivates halogen vacancies. This yields quantum dots with near-unity PLQY and robust stability, leading to LEDs achieving a maximum external quantum efficiency (EQE) of 24.28% and luminance of 122,786 cd m −2 , far surpassing control devices. Further shortening the ligand chain increases EQE to 27.89% but at the cost of severe luminance loss, underscoring the delicate balance in ligand engineering.
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