LANGMUIR
·
2023
·
IF 3.9
Xin Wang,Jimei Wu,Zhiguang Zhang,Guirong Xiong
Nanoparticle (NP) self-assembly from suspension evaporation has been a topic of interest in recent times to fabricate a solid-state structure with diverse functions. We present a simple and facile evaporation-induced strategy for the formation of NP arrays on a flat substrate utilizing a template-directed sandwich system. The lithographic features assist the assembly of the typical nanoparticles (NPs), including SiO2, QDs@PS FMs, and QDs, on the top into circle, stripe, triangle, or square geometries with a fixed width of 2 μm. Additionally, an anionic surfactant, sodium dodecyl sulfonate (SDS), is incorporated into a negatively charged, hydrophilic SiO2 dispersion to govern the aggregation and self-assembly of NPs, fine tuning the morphologies of the residual structures on the substrate. SDS is attributed to modify the nature of SiO2 NPs to be hydrophobic, increase the hydrophobic attraction, dominating particle–particle and particle–interface interactions, and strengthen the particle–particle repulsive electrostatic force that results in the reduction of SiO2 NPs trapped in the separated colloidal suspension drop. Thus, using the SDS surfactant with the concentration ranging from 0 to 1 wt %, the obtained well-ordered SiO2 NP pattern packing on the substrate varies from six layers to one layer.
研究领域:
材料科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 34
·20789-20794
·
IF 3.108
Vikramjeet Singh,Tao Guo,Li Wu,Jianghui Xu,Botao Liu,Ruxandra Gref,Jiwen Zhang
Despite its 3D porous structure, the pharmaceutical applications of cyclodextrin based cross-linked polymers are limited due to their structural irregularities. To address this issue, a template-directed strategy is used to obtain cubic micro and nano cyclodextrin cross-linked polymer (CD-cubes) from cyclodextrin metal organic frameworks in this study. The well-organized γ-CDs in MOFs were crosslinked by diphenyl carbonate by a facile single step chemical reaction. Scanning electron microscopy and X-ray diffraction analysis revealed the almost perfect cubic shapes of the particles with a disordered internal structure. Contrarily to the non-crosslinked materials which immediately dissolved in water, the CD-cubes were remarkably stable after extensive washing with water. The CD-cubes possessed a mesoporous structure with pore size in the range of 2–4 nm and showed much higher BET surface and 8 times higher adsorption capacity for doxorubicin as compared to conventional cyclodextrin-sponges.
研究领域:
药学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xudong Wu,Bingqian Zu,Aoshuo Tian,Song Chen,Zilong Xu,Tao Ma,Liang Wu
Tin dioxide (SnO2) anodes have emerged as a promising and cost-effective alternative for high-energy-density lithium-ion batteries (LIBs). However, their practical implementation is limited by rapid capacity degradation and poor rate performance, which are attributed to severe volume fluctuations, phase aggregation, and sluggish reaction kinetics during cycling. Here, we report a straightforward and efficient template-directed oxidation strategy for the synthesis of two-dimensional polycrystalline SnO2 nanosheets as advanced LIB anodes using layered tin diselenide nanosheets as sacrificial precursors. The SnO2 nanosheets synthesized at 500 °C (SnO2-500) exhibit a wrinkled lamellar architecture comprising interconnected SnO2 nanoparticles, which is advantageous for applications in LIBs. As a result, the obtained SnO2-500 anode delivered exceptional cycling stability (623.7 mA h g–1 after 100 cycles at 0.5 A g–1), along with outstanding specific capacity and rate performance (1245.7 mA h g–1 at 0.1 A g–1 and 554.1 mA h g–1 at 5 A g–1).
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Fan Xia,Jian Yang,Jingwen Chen,Ximeng Liu,Zhefan Ma,Jinlou Gu
Although hierarchically porous zeolitic imidazolate frameworks (HPZIFs) not only inherit the intrinsic architectural and chemical stabilities of their microporous counterparts but also afford open space for the efficient mass diffusion of the macromolecules involved, their rational design and construction are still challenging. Herein, HPZIFs with tailorable pore sizes ranging from 18 to 54 nm were successfully fabricated by using a newly developed soft-template-directed strategy. Our success rooted in the fact that the screened PS81–PVP44–PEO113 triblock copolymer could effectively coordinate with the metal precursor for the directed crystallization of ZIFs along surfactant assemblies. The advantages of continuous large pores and open structures in such HPZIFs were fully taken into account to serve as a bioreactor for the efficient immunoassay. The expanded large pores provided not only a significantly vast surface area to enhance the density of capture antibodies but also enough space for accommodating multiple conjugated biomolecules in one pore channel. In combination with a cascade enzyme cycle amplification strategy, a model biomarker of prostate-specific antigen (PSA) at the femtomolar level was checked with a limit of detection of 92 fM using the developed immunosensor. Specific screening on patients with prostate cancer or even benign prostatic hyperplasia was exemplified through accurately quantifying small changes of PSA concentration in clinical serum samples, prefiguring the great potential of the developed HPZIF-8 immunosensor platform for the early monitoring and diagnostics of diseases.
研究领域:
材料科学
·
分析化学
·
生物传感器
·
生物医学工程
·
纳米技术
✓ 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）