共查询到18条相似文献，搜索用时 62 毫秒
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制备纳米多孔材料的模板自组装技术 总被引：3，自引：0，他引：3
纳米自组装技术的突出优点是:通过改变相应模板的形状和大小可以实现对不同材料形状、结构和大小的预先控制,从而拓展了它的应用范围。本文主要阐述了纳米多孔材料模板自组装技术的原理和工艺流程,介绍了这种技术的几种典型方法的最新进展,并比较了各种方法的优劣,同时展示了它的应用前景。 相似文献
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《电子技术与软件工程》2017,(2)
纳米技术是从二十世纪八十年代开始迅速发展的技术,纳米(nm)是一个长度单位,纳米体系大都被作为1~100nm的范围当中。它的主要原理是在纳米尺寸的范围中了解及改变自然,经过直接操作来对原子、分子进行安排,创造出新的物质。本文主要介绍了纳米技术的内涵以及对纳米技术的应用方面进行相应的探讨。 相似文献
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自组装的形式化研究最终使得Tile自组装模型得以定义,系统中的因子编码可以随意地由不同部分组成。这个计算利用了不确定性的优势,但是在理论上每一个不确定性的路径都是以平行的方式被执行的,所以为了高效率解决路径的问题,就要增加现行规模的投入。文章主要对自组装模型的理论部分加以证明,并以实际例来说明这个模型的正确性。 相似文献
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针对有机液晶材料在实际应用中存在热稳定性不足和温度区间较窄等问题,结合快速发展的纳米材料合成及组装技术,发挥无机纳米材料富电子、高热稳定的特点,发展新型无机液晶态材料是目前一个热点研究领域.本文从归纳液晶态组装所蕴含的相变规律及调控机理出发,包括Onsager硬棒理论、DLVO理论、胶体系统中的熵作用(如排空吸引和位阻... 相似文献
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王浩岚;张涛;熊诗圣;李思坤 《中国激光》2024,(11):578-595
导向自组装（DSA）光刻能够以更低的成本制造集成电路纳米结构,有望将传统光刻拓展应用到更小的工艺节点,是国际器件与系统路线图中列出的主要候选光刻技术之一。嵌段共聚物的导向自组装受引导模板尺寸及形貌、模板对两嵌段亲疏性差异,以及嵌段共聚物材料化学性质、体积分数等多种参数的影响。通过实验遍历整个参数空间寻找最优工艺条件不仅所需周期长而且成本很高。DSA光刻仿真技术能够预测不同参数条件下的DSA结构,研究缺陷形成的机理,反向设计所需的引导模板和材料,已成为DSA光刻工艺研发与应用过程中不可或缺的关键技术。本文综述了自洽场模型、蒙特卡罗方法、动力学模型、简化模型等常见DSA光刻仿真技术的基本原理及其在DSA光刻中的应用。各仿真技术在计算精度、适用范围和计算速度等方面存在较大不同,需要根据不同的应用场景选择不同的仿真技术。 相似文献
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纳米科技近年来的迅猛发展带动物理、化学、生物和医学等众多学科进入全新的领域,其前景是可以预见的。本文从生物医学的众多技术之一——克隆技术,展望了纳米技术的应用前景。 相似文献
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Stéphane C. Corgié Patarawan Kahawong Xiaonan Duan Daniel Bowser Joseph B. Edward Larry P. Walker Emmanuel P. Giannelis 《Advanced functional materials》2012,22(9):1940-1951
Bio‐nanocatalysts (BNCs) consisting of horseradish peroxidase (HRP) self‐assembled with magnetic nanoparticles (MNPs) enhance enzymatic activity due to the faster turnover and lower inhibition of the enzyme. The size and magnetization of the MNPs affect the formation of the BNCs, and ultimately control the activity of the bound enzymes. Smaller MNPs form small clusters with a low affinity for the HRP. While the turnover for the bound fraction is drastically increased, there is no difference in the H2O2 inhibitory concentration. Larger MNPs with a higher magnetization aggregate in larger clusters and have a higher affinity for the enzyme and a lower substrate inhibition. All of the BNCs are more active than the free enzyme or the MNPs (BNCs > HRP ? MNPs). Since the BNCs show surprising resilience in various reaction conditions, they may pave the way towards new hybrid biocatalysts with increased activities and unique catalytic properties for magnetosensitive enzymatic reactions. 相似文献
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Young‐Jae Jin Joon‐Hyun Yoon Toshikazu Sakaguchi Chang‐Lyoul Lee Giseop Kwak 《Advanced functional materials》2016,26(25):4501-4510
Sulfonated poly(diphenylacetylene) (SPDPA) is used as an anionic conjugated polyelectrolyte to examine stoichiometric electrostatic self‐assembly with homologous cationic surfactants (octadecyl)X(methyl)Y ammonium bromides (OXMYABs) having different numbers of long hydrophobic tails. The SPDPA–OXMYAB complexes formed show significantly increased water contact angle and enhanced fluorescence (FL) emissions compared with the pristine SPDPA. The complexes exist in a gum state at room temperature owing to the plasticizer effect of the hydrophobic tails, hence they are very soft and highly stretchable. The hydrophobicity, softness, and FL quantum efficiency of the SPDPA–OXMYAB complexes increase as the number of hydrophobic tails increases. SPDPA adsorbs uniformly onto filter papers to produce fluorescent papers. The SPDPA‐adsorbed papers have many unique applications, including FL image writing, fingerprinting, stamping, and inkjet printing using the surfactant solutions as an ink to reveal high‐resolution FL images. In particular, multideposit inkjet‐printing using SPDPA and OXMYAB solutions as inks produces water‐resistant, embedded figures in paper currency. 相似文献
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Zhaoyue Lv Zhemian Li Shaolan Zou Peiran Li Nachuan Song Rui Zhang Mengdi Xu Mingxing Liu Fengqin Li Junru Li Peifeng Liu Chi Yao Dayong Yang 《Advanced functional materials》2024,34(12):2311069
CRISPR/Cas9 system is promising for the reversal of tumor immunosuppression in immunotherapy, but the controlled delivery of CRISPR/Cas9 remains challenging. Herein, the study reported a smart DNA nanoassembly containing multivalent aptamers, realizing the controlled delivery of Cas9/sgRNA ribonucleoprotein (RNP) for enhanced cancer immunotherapy. A single-stranded DNA complementary to sgRNA in the Cas9/sgRNA RNP can initiate a cascade-clamped hybridization chain reaction (C-HCR) to wrap the Cas9/sgRNA RNP up in the DNA nanoassembly. After selective internalization of DNA nanoassembly by cancer cells, Cas9/sgRNA RNP is released to cytoplasm in response to endogenous RNase H and enters the nuclei to knock out β-catenin. The expression of the programmed death-ligand one gene is effectively suppressed, and the immunosuppressive tumor microenvironment is reprogrammed. Meanwhile, the migration of cancer cells is inhibited, and the apoptosis of cancer cells is promoted. In a breast cancer mouse model, the administration of DNA nanoassembly effectively increased the infiltration of CD8+ T cells, eventually achieving high therapeutic efficacy. 相似文献
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Meihe Yuan Yuhang Dong Zhaoyue Lv Jinqiao Liu Mingxing Liu Mengdi Xu Xiaocui Guo Chi Yao Dayong Yang 《Advanced functional materials》2024,34(17):2312880
Developing artificial material systems to rationally interfere with organelles is emerging as a promising route to regulate the behaviors and fate of cells, thus providing new therapeutic strategies. Herein, a DNA nanoparticles (DNPs)-based material system is reported, which achieves controlled sequential assembly inside cells, and realizes specific interference toward mitochondria. Two types of DNPs are synthesized via radical polymerization, followed with cascade hybridization chain reaction of hairpin DNA with Cyanine5 (Cy5) for mitochondrial targeting, and with complementary sequences for base pairing, respectively. DNPs with Cy5 (Cy5-DNPs) first entered cells to target mitochondria, and the other DNPs with complementary sequences entered cells after an interval to sequentially assemble with Cy5-DNPs into aggregates via base pairing. Mitochondrial interference is achieved, including increased reactive oxygen species, decreased membrane potential, abnormal elevation of Ca2+ level, decreased adenosine triphosphate, and attenuated cellular migration rate. In particular, by regulating the intervals of two types of DNPs entering cells, the mitochondrial interference degree is controllably modulated. This work achieves regulated organelles interference via the precise controlled self-assembly of DNA nanostructures inside cells, which is envisioned to have great potential in precision biomedicine. 相似文献
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Yan Sun Chao‐Guo Yan Yong Yao Ying Han Ming Shen 《Advanced functional materials》2008,18(24):3981-3990
Amphiphilic resorcinarene‐based multiwalled microtubes, millimetres in diameter and centimetres in length, are generated in water. The thickness of the tube wall approaches 300 nm. Their self‐assembly properties are investigated using transmission electron microscopy, scanning electron microscopy, atomic‐force microscopy, dynamic light scattering, X‐ray diffraction, UV‐vis spectra, and Fourier transform IR techniques. From these studies, the structures critical for the self‐assembly of resorcinarene into microtubes in aqueous media are determined. Furthermore, the study manifests a feasible method that aims to completely change the structure from a microtube to a sheet‐like morphology by selectively eliminating key groups. Subsequently, resorcinarene‐capped water‐soluble gold nanoparticles (AuNPs) are fabricated. By utilizing the obtained microtubes as a template, a gold/organic microtubular composite is successfully prepared. 相似文献
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Micromotors: Magnetically Modulated Pot‐Like MnFe2O4 Micromotors: Nanoparticle Assembly Fabrication and their Capability for Direct Oil Removal (Adv. Funct. Mater. 39/2015) 
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下载免费PDF全文 Fangzhi Mou Deng Pan Chuanrui Chen Yirong Gao Leilei Xu Jianguo Guan 《Advanced functional materials》2015,25(39):6276-6276
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