Hans Journal of Nanotechnology

Journal Information
ISSN / EISSN : 2161-086X / 2161-0878
Current Publisher: Hans Publishers (10.12677)
Former Publisher: Scientific Research Publishing, Inc. (10.4236)
Total articles ≅ 114
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涛张 正
Published: 1 January 2021
Hans Journal of Nanotechnology, Volume 11, pp 1-7; doi:10.12677/nat.2021.111001

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澳田 迎
Published: 1 January 2021
Hans Journal of Nanotechnology, Volume 11, pp 9-18; doi:10.12677/nat.2021.112002

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张 荣
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 43-45; doi:10.12677/nat.2020.103006

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萍冯 彩
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 16-24; doi:10.12677/nat.2020.102003

Abstract:
本文利用Fe3O4的磁性性质和CuInS2的荧光特性,构建基于[email protected]的磁共振/荧光双模式成像系统。采用溶剂热法制备具有良好分散性的超顺磁Fe3O4纳米颗粒,利用胶体法合成新型CuInS2/CdS/ZnS核壳量子点,通过表面酰胺键缩合,构建[email protected]核壳结构。结果表明,[email protected]复合粒子具有超顺磁性和近红外荧光发射峰,经过表面PEG修饰,能够有效进入细胞,实现磁共振和荧光双模式细胞成像。该系统后续有望应用于医学诊断、药物研究、生物检测等领域,为双模式生物成像提供一个新思路。 This work constructs a dual-mode imaging system with nuclear magnetic resonance and fluores-cence imaging based on the magnetic properties of Fe3O4 and the fluorescence properties of CuInS2. Superparamagnetic Fe3O4 nanoparticles were synthesized by solvothermal method, and SiO2 was loaded on its surface. CuInS2/CdS/ZnS core-shell ternary quantum dots were combined on the surface to form [email protected] core-shell structure. The results show that the [email protected] composite particles have superparamagnetism and NIR fluorescence emission band. And after surface PEG modification, it could effectively enter the cell and achieve magnetic resonance and fluorescence double-mode cell imaging. The nuclear magnetic resonance/fluorescence dual-mode imaging system based on [email protected] is expected to be applied in medical diagnostics, drug re-search, biological detection and other fields, and provide a new idea for dual-mode biological im-aging.
昆张 昆
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 59-68; doi:10.12677/nat.2020.104008

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伟何 艳
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 34-42; doi:10.12677/nat.2020.102005

Abstract:
钙钛矿太阳能电池以其成本低廉和优异的光电性能受到广泛的关注,其中钙钛矿光活性层的质量对组装电池的光电性能起着至关重要的作用。本文通过在钙钛矿前驱体溶液中添加路易斯碱——尿素(urea),详细研究了尿素添加量对钙钛矿薄膜微结构和组装电池光电性能的影响。研究发现,钙钛矿前驱液中添加尿素是一种有效的获得大晶粒、致密平整钙钛矿薄膜的策略。高质量的钙钛矿薄膜减少了晶界,抑制了电池中载流子的复合,因而提升了器件的能量转换效率。在尿素添加量为10%时,组装电池具有18.90%的最佳能源转换效率。 Perovskite solar cells have attracted much attention due to their low cost and excellent photoe-lectric performance. The quality of the perovskite active layer plays a vital role in the performance of the solar cells. In this paper, urea as one of the Lewis bases has been added into the precursor solution of perovskite, and the effects of urea addition on the microstructure of perovskite thin films and the photovoltaic properties of the cells have been studied. It is found that the addition of urea in perovskite precursor is a promising strategy for obtaining compact and flat perovskite film with large grain size. The high quality of perovskite thin film reduces the grain boundaries of film, and suppresses the recombination of carriers. It therefore improves the photovoltaic performance of assembled perovskite solar cells. An optimum energy conversion efficiency of 18.90% was achieved in the cell with urea addition of 10% in the perovskite precursor.
娟姚 慧
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 7-15; doi:10.12677/nat.2020.102002

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民于 亚
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 1-6; doi:10.12677/nat.2020.101001

The publisher has not yet granted permission to display this abstract.
国闫 卫
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 25-33; doi:10.12677/nat.2020.102004

Abstract:
传统油水分离方法主要有离心法、凝聚法、氧化还原法及盐析法。这些方法分离过程能耗高,并且分离效率低消耗大量溶剂,导致大量废物污染。为了处理油水混合物或油水乳液,许多多孔材料被应用。然而,传统的膜制造方法,如非溶剂导相分离,热诱导相分离和蒸汽诱导分离等消耗大量溶剂,导致大量废物污染。本文主要提出了一种以二氧化硅纤维膜为基底,用无水乙醇与蜡烛烟灰溶液对其改性,制得具有疏水亲油性的油水分离薄膜。运用接触角测量仪、扫描电镜、拉曼光谱仪对其表面浸润性、结构、形貌和物质成分进行分析。结果表明改性后的二氧化硅纤维膜具有疏水性(疏水角可达146˚)。能够选择性吸附水上浮油,还可以对油水乳浊液实现分离。该碳黑纤维膜制备工艺简单,分离过程方便,可有效解决油水分离问题。 The traditional methods of oil and water separation mainly include centrifugal method, condensa-tion method, redox method and salting out method. The separation process of these methods has high energy consumption and low separation efficiency. Many porous materials are used to treat oil-water mixtures or oil-water emulsions. However, the traditional methods of membrane manu-facturing, such as non-solvent phase separation, thermally induced phase separation and steam induced phase separation, consume a lot of solvents, resulting in a lot of waste pollution. This paper mainly proposes a silica fiber membrane as the substrate, which is modified with anhydrous ethanol and candle soot solution to make it hydrophobic and lipophilic. The surface wetting, structure, morphology and material composition were analyzed by contact Angle measuring in-strument, scanning electron microscope and Raman spectrometer. The results show that the mod-ified silica fiber membrane is hydrophobic (the hydrophobic angle can reach 146˚). It can selec-tively adsorb oil floating on water and separate oil-water emulsion. The carbon black fiber mem-brane has a simple preparation process and a convenient separation process, which can effectively solve the problem of oil-water separation.
徐 勇
Published: 1 January 2020
Hans Journal of Nanotechnology, Volume 10, pp 51-58; doi:10.12677/nat.2020.103007

Abstract:
在本文中,我们以石墨烯掺杂的纳米氧化铝作为钙钛矿太阳电池中的骨架层/电子传输层,以石墨烯优异的导电性能改善纳米氧化铝导电子的能力,增加钙钛矿吸收太阳光激发后产生的电子在光阳极上的收集效率,提升光伏性能;研究发现,掺杂不同的石墨烯可明显改善电子收集性能,随着石墨烯含量的增加,太阳电池的短路电流有增加的趋势,证实了石墨烯掺杂对氧化铝骨架层/电子收集层的改善能力;石墨烯掺杂同时会影响太阳电池的开路电压和填充因子,在改善导电子能力增加电子收集能力的同时,电子–空穴复合也有增加的趋势,因此在氧化铝为基础的钙钛矿太阳电池中,石墨烯的掺杂量要实现精细化控制,从而提高太阳电池的光伏性能,在本文中,当石墨烯含量为0.02%时,获得了最高11.58%的光电转化效率。 In this work, we used graphene-doped nano aluminum oxide as the skeleton/electron transporting layer in perovskite solar cells (PSCs). The excellent conductivity of graphene improved the electron conducting ability of nano aluminum oxide, increased the collection efficiency of electrons generated by perovskite layer after absorbing solar light. It was found that the short-circuit current of solar cells could be improved with the increase of graphene content. These results confirmed the improvement ability of graphene doping on the photovoltaic performance in PSCs with aluminum oxide as the skeleton/electron transporting layer. However, the graphene doping in aluminum oxide could also affect the open circuit voltage (Voc) and filling factor (FF) of solar cells. The combination of electron with hole was also increased, resulting in decreased Voc and FF. So, the contents of graphene must be precisely designed. In this work, the highest photoelectric conversion efficiency of 11.58% is obtained with the 0.02%content of graphene.
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