Journal of Physical Chemistry C
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2013
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IF 4.814
Xiaoyu Sun,Ke Ding,Yi Hou,Zhenyu Gao,Wensheng Yang,Lihong Jing,Mingyuan Gao
Monodispersed superparticles (SPs) consisting of hydrophobic CuInS2@ZnS quantum dots (QDs) were prepared through a self-assembling process induced by introducing ethanol into the cyclohexane solution of the QDs stabilized by 1-dodecanethiol. The solvent polarity-dependent size and size distribution of the resultant SPs were carefully characterized by using scanning electron microscopy, transmission electron microscopy, and dynamic light scattering. The formation and the growth mechanism of the SPs were investigated. By manipulating the nucleation and the growth kinetics through the addition rate of ethanol, the size was effectively tuned without broadening the size distribution of the SPs. By overcoating the SPs with amphibious Fe3O4 nanocrystals (NCs) stabilized by poly(4-vinylpyrollidone), aqueous dispersible SPs were obtained. Inheriting the fluorescent and magnetic properties from the corresponding mother particles, the resultant SPs presented excellent fluorescent and magnetic properties and, thus, may potentially be useful for bioseparation, detection, etc.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2020
·
IF 5.88
Binbin Liang,Tao Deng,Jinping Li,Xueliang Ouyang,Weidan Na,Dawei Deng
The rational design of theranostic systems are critical for addressing challenging issues associated with cancers. Toward this objective, the multifunctional biomimetic superparticle, termed as DOX-QDs-Lip@M, which can specifically deliver drug to tumor and synergistically monitor their therapeutic effects, was fabricated. Initially, anticancer drug doxorubicin hydrochloride (DOX) and imaging agent quaternary quantum dots (QDs) were loaded into the hydrophilic core region and hydrophobic chamber of liposome by self-assembly method, respectively. The integrated nanostructure can greatly increase the fluorescence intensity of signal unit and tremendously improve the diagnostic sensitivity. Subsequently, the biomimetic DOX-QDs-Lip@M was constructed by fusing and coating the isolated macrophage membranes on the surface of liposome, which can consequently extend the circulation of the whole blood and effectively target the tumor sites. Moreover, the naturally formed biofilm can stabilize the artificial liposome structure, which can prevent the leakage of the loaded materials in the liposome. These integrated properties endow the biomimetic DOX-QDs-Lip@M with improved tumor imaging and anti-metastasis treatment in living systems.
研究领域:
肿瘤学
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生物医学工程
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纳米医学
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DOI
PubMed
高影响因子
ACS Nano
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2024
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IF 15.8
Xiaojing Wang,Yiming Xu,Siyuan Xiang,Shengyang Tao,Wendong Liu
Supraparticles, formed through the self-assembly of nanoparticles, are promising contenders in catalysis, sensing, and drug delivery due to their exceptional specific surface area and porosity. However, their mechanical resilience, especially in dimensions spanning micrometers and beyond, is challenged by the inherently weak interactions among their constituent building blocks, significantly constraining their broad applicability. Here, we have exploited a robust supraparticle fabrication strategy by integrating hydrogel components into the assembly system and evaporating on the superamphiphobic surface. The resultant SiO2/SA (sodium alginate) supraparticles, achieved by evaporating a 15% volume fraction dispersion of SiO2 nanoparticles containing 18.46 mg/mL of sodium alginate and subsequently cross-linking with Ca2+, demonstrate mechanical robustness with a fracture force of 6.04 N, representing a mechanical strength enhancement of 60 times higher than that prior to the incorporation of the hydrogel component. The supraparticles maintain their original morphology after 30 min of ultrasonic treatment (200 W), demonstrating mechanical stability. This method exhibits generalizability, enabling the customization of supraparticles with various building blocks and hydrogel backbone materials. Based on such a methodology, we have synthesized enzyme-carrying supraparticles, further expanding the potential applications in intricate cascade reactions. The encapsulated glucose oxidase and horseradish peroxidase maintained their inherent reactivity, and such hydrogel-assisted robust supraparticles exhibited exceptional performance in accurate glucose assays, indicating great practical application in biocatalysis.
研究领域:
材料科学
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生物化学
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纳米技术
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DOI
PubMed
高影响因子
Journal of Physical Chemistry C
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2021
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IF 4.126
Wanjie Xu,Mingwei Ji,Yuanzhi Chen,Hongfei Zheng,Laisen Wang,Dong-Liang Peng
The construction of magnetic colloidal superparticles can utilize the properties from both individual assembly units and their collective interactions; thus, it can meet wider demands in multiple fields. Although many studies have focused on the magnetic oxide superparticles, very limited study has been conducted on magnetic metal superparticles. Herein, we report on the microemulsion-based preparation of Ni colloidal superparticles with tunable sizes and magnetic properties. The prepared Ni colloidal superparticles have a spherical morphology with an average size that can vary from 130 to 700 nm. The key influential factors in the formation of superparticles are being investigated. Magnetic measurements reveal room-temperature superparamagnetic characteristics for all superparticle samples. The calculated interaction energy values indicate that strong magnetic interactions are present in Ni superparticles. Although Ni superparticles with a size of about 700 nm are still room-temperature superparamagnetic, annealed Ni superparticles with a much smaller size of about 390 nm instead exhibit room-temperature ferromagnetic characteristics. This behavior is quite different from that of magnetic nanoparticles. Our results demonstrate that the construction of magnetic colloidal superparticles through adjustments to the parameters of the assembling units may provide them with rich magnetic properties, thus making them useful in a wider range of applications.
研究领域:
材料科学
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磁学
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纳米技术
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DOI
高影响因子
Chemistry-Switzerland
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2023
·Vol. 5
·期 3
·1990-1997
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IF 2.1
Rui Wang,Yunyun Zheng,Yunsheng Xia
In this study, we present solid state processes for the fabrication of copper nanoclusters (NCs) and hierarchical supraparticles (SPs). To achieve this, copper salt and thiols are mixed and are then grinded for 10–15 min, and the nano-products are thereby obtained. Interestingly, it was found in this study that the formation of the NCs or SPs is completely dependent on the grinding methods that are used: with mechanical grinding, the products are several nanometer-sized NCs, whereas manual grinding in an agate mortar can obtain Cu SPs with diameters as low as 10 nm all the way up to 200 nm. The photoluminescence emission wavelength of the nano-products is located at ~680 nm. The Stokes shift of the obtained nanomaterials is more than 300 nm. The emission quantum yields of the Cu NCs and SPs are as high as 47.5% and 63%, respectively. Due to their facile fabrication processes and their favorable optical properties, the two as-prepared types of copper nano-materials exhibit great potential for bio-imaging and bio-sensing applications.Keywords:Cu nanoclusters;supraparticles;solid fabrication
研究领域:
材料科学
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生物学
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纳米技术
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DOI
高影响因子
Advanced Science
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2022
·Vol. 9
·期 16
·2105292
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IF 17.521
Yawen Jiang,Xinyu Wang,Delong Duan,Chaohua He,Jun Ma,Wenqing Zhang,Hengjie Liu,Ran Long,Zibiao Li,Tingting Kong,Xian Jun Loh,Li Song,Enyi Ye,Yujie Xiong
Structural reconstruction is a process commonly observed for Cu-based catalysts in electrochemical CO 2 reduction. The Cu-based precatalysts with structural complexity often undergo sophisticated structural reconstruction processes, which may offer opportunities for enhancing the electrosynthesis of multicarbon products (C 2+ products) but remain largely uncertain due to various new structural features possibly arising during the processes. In this work, the Cu 2 O superparticles with an assembly structure are demonstrated to undergo complicated structure evolution under electrochemical reduction condition, enabling highly selective CO 2 -to-C 2+ products conversion in electrocatalysis. As revealed by electron microscopic characterization together with in situ X-ray absorption spectroscopy and Raman spectroscopy, the building blocks inside the superparticle fuse to generate numerous grain boundaries while those in the outer shell detach to form nanogap structures that can efficiently confine OH − to induce high local pH. Such a combination of unique structural features with local reaction environment offers two important factors for facilitating C−C coupling. Consequently, the Cu 2 O superparticle-derived catalyst achieves high faradaic efficiencies of 53.2% for C 2 H 4 and 74.2% for C 2+ products, surpassing the performance of geometrically simpler Cu 2 O cube-derived catalyst and most reported Cu electrocatalysts under comparable conditions. This work provides insights for rationally designing highly selective CO 2 reduction electrocatalysts by controlling structural reconstruction.
研究领域:
材料科学
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电化学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Junjie Qiu,Xiangyun Xi,Shuoran Zheng,Tongtao Li,Yajun Wang,Xiaomeng Ren,Angang Dong
In this study, we report the rational design and synthesis of carbonized NiFe 2 O 4 superparticles (CarSPs) hierarchically integrated with densely aligned carbon nanotube (CNT) architectures, hereafter denoted as CarSP-CNTs, which exhibit a biomimetic urchin-like morphology. Through exploitation of the colloidal self-assembly and catalytic functionalities inherent to NiFe 2 O 4 nanoparticles (NPs), we achieve seamless integration of one-dimensional CNT arrays with three-dimensional superstructural frameworks. Systematic investigation reveals that the pre-carbonization of surface-bound organic ligands coupled with subsequent CNT growth induces synergistic interplay between conductive carbon matrices and active spinel oxide phases. This structural optimization confers CarSP-CNTs with enhanced charge transfer kinetics and catalytically robust interfaces, as evidenced by their superior electrocatalytic performance for the oxygen evolution reaction (OER) in alkaline electrolyte (1 M KOH). The optimized CarSP-CNTs exhibit a minimal overpotential of 307 mV to deliver a current density of 10 mA cm −2 , alongside remarkable operational stability exceeding 20 h of continuous electrolysis. These findings establish a paradigm for the rational design of hierarchically structured, multi-component electrocatalysts through coordinated nanoscale engineering, offering a versatile platform for advancing energy conversion technologies.
研究领域:
材料科学
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电催化
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纳米技术
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Xiaohong He,Kun Jia,Yun Bai,Zhongyuan Chen,Yiyao Liu,Yumin Huang,Xiaobo Liu
Simultaneous detection of multiple heavy metal ions (HMI) is of great importance for the environmental monitoring, and the analytical tools based on multiband emissive fluorescent probes have been regarded as one of the most promising candidate for multiple HMI detection. Herein, the rod-coil amphiphilic block copolymer (BCP) with intrinsic blue fluorescence emission has been synthesized and subsequently employed to encapsulate two types of hydrophobic quantum dots (QD) with green and red fluorescence emission via the three dimensionally confined emulsion self-assembly, leading to the generation of white-emitting superparticles showing good colloidal stability and stable aqueous phase fluorescence. Furthermore, it was found that the fluorescence emission intensity of obtained superparticles can be selectively quenched by Ag + , Hg 2+ , Cu 2+ and Fe 3+ ions via different mechanisms, and the four metal ions can be further discriminated according to their distinct combinational quenching effects onto three fluorescent bands of white-emitting superparticles. In addition, an analytical model was built to enable the simultaneous detection of Cu 2+ , Hg 2+ and Fe 3+ in the real sample. Basically, the current work opens the new way to fabricate fluorescent probes with multiple emission bands, which can be easily adapted to prepare more complicated QD encoded fluorescent probes for high throughput detection.
研究领域:
环境科学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Qian Xu,Wentao Yan,Wei Li,Yue Yuan,Kaiyuan Liu,Zibing Pan,Qianqian Guo,Long Jiao,Yanjun Hu
Supraparticles, the small aggregation entities of functional micro/nanoparticles, are crucial in materials science, chemistry, and nanotechnology owing to their unique properties and wide range of applications. Evaporation-driven self-assembly of colloidal droplets on surfaces has proven effective for supraparticle synthesis. However, challenges such as low production rates, adhesion risks, cross-contamination, and limited flexibility continue to hinder the widespread adoption of this method. To address these challenges, this study proposes an innovative strategy that uses the novel lotus-seed head and Nepenthes-inspired trap-array slippery surfaces (TASS). These surfaces feature a macroscopic trap array and a lubricant layer for high-throughput supraparticle synthesis. The lubricant traps provide a self-locating and stable lubrication effect, enabling the retreatment of addressable droplet array contact lines during evaporation, leading to the successful fabrication and collection of the supraparticle array. Additionally, the method demonstrates high synthesis flexibility, allowing for the creation of various supraparticle structures, morphologies, and porosities. As a proof of concept, core–shell magnet-actuated photocatalytic supraparticles were synthesized using TASS and showed enhanced contaminant degradation efficiency. This novel surface-template strategy provides a promising approach for large-scale, evaporation-driven supraparticle synthesis, with potential applications in catalysis, energy storage, and carbon capture.
研究领域:
材料科学
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纳米技术
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化学工程
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DOI
PubMed
高影响因子
Small
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2024
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IF 13
Wanjie Xu,Yuanzhi Chen,Markus Niederberger,Elena Tervoort,Jie Mei,Dong-Liang Peng
Self-assembly of colloidal nanoparticles enables the easy building of assembly units into higher-order structures and the bottom-up preparation of functional materials. Nickel phosphides represent an important group of catalysts for hydrogen evolution reaction (HER) from water splitting. In this paper, the preparation of porous nickel phosphide superparticles and their HER efficiencies are reported. Ni and Ni 2 P nanoparticles are self-assembled into binary superparticles via an oil-in-water emulsion method. After annealing and acid etching, the as-prepared Ni-Ni 2 P binary superparticles change into porous nickel phosphide superparticles. The porosity and crystalline phase of the superparticles can be tuned by adjusting the ratio of Ni and Ni 2 P nanoparticles. The resulting porous superparticles are effective in driving HER under acidic conditions, and the modulation of porosity and phase further optimize the electrochemical performance. The prepared Ni 3 P porous superparticles not only possess a significantly enhanced specific surface area compared to solid Ni-Ni 2 P superparticles but also exhibit an excellent HER efficiency. The calculations based on the density functional theories show that the (110) crystal facet exhibits a relatively lower Gibbs free energy of hydrogen adsorption. This work provides a self-assembly approach for the construction of porous metal phosphide nanomaterials with tunable crystalline phase and porosity.
研究领域:
材料科学
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化学
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能源科学
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DOI
PubMed
高影响因子
ACS Nano
·
2023
·
IF 17.1
Rui Gao,Changlong Hao,Liguang Xu,Xinxin Xu,Jing Zhao,Maozhong Sun,Qing Wang,Hua Kuang,Chuanlai Xu
Titanium dioxide (TiO2) has attracted significant attention in the fields of antibacterial activity and pollutant degradation due to its well-known photocatalytic properties. However, the application of TiO2 is significantly limited by its large band gap width, which only allows excitation by ultraviolet light below 400 nm. Here, we propose the use of surface chiral functionalization of TiO2 to tune its band gap width, thus enabling it to be excited by near-infrared-region light (NIR), resulting in the effective separation of electron–hole pairs. By controlling the solvent polarity and forming numerous weak interactions (such as hydrogen bonding) between chiral ligands and TiO2, we successfully prepared chiral TiO2 superparticles (SPs) that exhibited a broad circular dichroism (CD) absorption at 792 nm. Under circularly polarized light (CPL) at 808 nm, the chiral SPs induced the separation of electron–hole pairs in TiO2, thus generating hydroxyl and singlet oxygen radicals. Antibacterial tests under CPL in NIR showed that the chiral TiO2 SPs exhibited excellent antibacterial performance, with inhibition rates of 99.4% and 100% against Gram-positive and Gram-negative bacteria, respectively. Recycling–reuse experiments and biocompatibility evaluation of the material demonstrated that the chiral TiO2 SPs are stable and safe antibacterial materials, thus indicating the potential application of chiral TiO2 SPs in antibacterial aspects of medical implants.
研究领域:
材料科学
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生物学
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医学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Huan Liu,Shijian Huang,Zhenping Liu,Lang Chen,Jiamei Chen,Xinyi Li,Mengjun Liu,Haoqiang Feng,Weilong Xu,Ruizhi Yang,Minmin Zhang,Lingling Shui
Physically confined assembly of binary colloidal mixtures in emulsion droplets provides a versatile platform for engineering supraparticles with tunable morphologies and functionalities. While single-component and hard-sphere colloidal assemblies have been extensively studied, the co-assembly of binary soft colloids presents unresolved challenges in architecture control and functional integration. In this work, we investigate the co -assembly performance of emulsion droplet confined binary soft colloids of spherical polystyrene nanoparticles (PS) and wire-like carbon nanotubes (CNTs). The supraparticles of CNT/PS with various architectures have been obtained by varying the solvent removal dynamics and the binary colloidal composition. We find out that the binary colloidal size and mass ratio govern the CNT/PS supraparticle structural diversity, ranging from core-shell, core-semishell, garnet-like to densely packed architectures. Spontaneous emulsification and microphase segregation drive the transformation from core-shell to core-semishell architectures, revealing the critical role of fluid dynamics and confinement effects. This understanding of mechanism enables the rational design of hybrid magnetic supraparticles, demonstrating the broad applicability of such an approach. By establishing clear composition-structure correlations, this work advances the controlled co-assembly of binary colloids into hierarchical supraparticles, offering a pathway for constructing functional materials with tailored complexity.
研究领域:
材料科学
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纳米技术
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胶体与界面科学
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软物质物理
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）