Advanced Materials Proceedings最新文献

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4th Assembly of Baltic Conference Series (BCS) 波罗的海会议系列(BCS)第四届大会

Advanced Materials Proceedings

Pub Date : 2021-12-08 DOI: 10.5185/amp.2018/0102

E. -

引用次数: 0

Tweaking homogeneity and stability of gold nanorods by synergistic action of pH and temperature pH和温度的协同作用对金纳米棒均匀性和稳定性的影响

Advanced Materials Proceedings

Pub Date : 2021-12-08 DOI: 10.5185/amp.2018/7005

N. Kumar, Shivesh Sharma, S. Nara

Commonly used seed-mediated method of gold nanorod synthesis has limitations like formation of by-products (stars, squares, dog-bones, platelets), slow but continuous growth during storage/ageing which adversely affects their homogeneity. Storage in the presence of cetyltrimethylammonium bromide (CTAB) is also essential to prevent their aggregation, which being toxic, needs to be removed before using them for biological applications. We herein, present a simple approach to overcome these limitations through synergistic action of low pH and high temperature. The proposed modifications synthesize highly homogeneous nanorods which are stable upto months even when stored in water. Copyright © 2018 VBRI Press.

常用的种子介导的金纳米棒合成方法存在一些局限性，如副产物(星形、方形、狗骨、血小板)的形成，在储存/老化过程中缓慢但持续的生长，这对其同质性产生不利影响。在存在十六烷基三甲基溴化铵(CTAB)的情况下储存也是必不可少的，以防止它们聚集，它们是有毒的，在将其用于生物应用之前需要清除。在此，我们提出了一种简单的方法，通过低pH和高温的协同作用来克服这些限制。所提出的修饰合成了高度均匀的纳米棒，即使在水中储存也可以稳定数月。版权所有©2018 VBRI出版社。

引用次数: 0

Ag-TiO2 nanoparticles for photocatalytic degradation of sparfloxacin Ag-TiO2纳米粒子光催化降解斯帕沙星

Advanced Materials Proceedings

Pub Date : 2021-12-08 DOI: 10.5185/amp.2018/7018

Raviraj M. Kulkarni, Ramesh S. Malladi, Manjunath S. Hanagadakar

Liquid Impregnation (LI) technique was developed to prepare 1% and 2% Ag doped Titania nanoparticles. The characterization of the prepared nanoparticles was achieved by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDX) and Transmission Electron Microscopy (TEM). The crystallite size was obtained by Scherrer equation analysis of XRD main peak of doped and undoped nanoparticles. It was observed that crystallite size of bare TiO2 was 17.00 nm, whilst the crystallite size of 1% Ag doped titania and 2% Ag doped titania was 13.07 nm to 14.17 nm. TEM images ascertained that particle size of Ag-TiO2 nanoparticles were in the range 40-45 nm in length and 10-15 nm in width. The pH of the solution exerted a negative effect on photodegradation rate of sparfloxacin. The masking effect on the degradation of sparfloxacin was observed at higher catalyst dosages. The increase in UV intensity linearly enhanced the degradation rate of sparfloxacin and the influence of initial sparfloxacin concentration on the degradation rate was investigated and discussed. Copyright © 2018 VBRI Press.

采用液相浸渍法制备了1%和2% Ag掺杂二氧化钛纳米颗粒。通过x射线衍射(XRD)、扫描电子显微镜(SEM)、能量色散x射线分析(EDX)和透射电子显微镜(TEM)对制备的纳米颗粒进行了表征。通过对掺杂和未掺杂纳米颗粒的XRD主峰进行Scherrer方程分析，得到了纳米颗粒的晶粒尺寸。结果表明，裸TiO2晶粒尺寸为17.00 nm, 1% Ag掺杂和2% Ag掺杂TiO2晶粒尺寸为13.07 nm ~ 14.17 nm。TEM图像确定了Ag-TiO2纳米颗粒的粒径范围为长40 ~ 45 nm，宽10 ~ 15 nm。溶液的pH值对司帕沙星的光降解率有负向影响。在较高的催化剂用量下观察到对斯帕沙星降解的掩蔽效应。紫外强度的增加线性提高了斯帕沙星的降解率，并考察了斯帕沙星初始浓度对降解率的影响。版权所有©2018 VBRI出版社。

引用次数: 2

Effect of thermal annealing on the structural, optical and microstructural properties of AgInSe2 thin films 热退火对AgInSe2薄膜结构、光学和微结构性能的影响

Advanced Materials Proceedings

Pub Date : 2021-11-30 DOI: 10.5185/amp.2016/1xx

R. Panda, R. Naik, Udai P. Singh, N. C. Mishra

引用次数: 0

Anti-wettability of Chemically and Physically Modified Glass Surfaces 化学和物理改性玻璃表面的抗润湿性

Advanced Materials Proceedings

Pub Date : 2021-01-01 DOI: 10.5185/amp.2021.010421

S. Sbeih, W. Steffen, M. Kappl

引用次数: 1

Preparation and Characterization of Chitosan-Wrapped Silver Nanoparticles Incorporated Poly (Vinyl Alcohol) Membranes for Purification of Biogas 壳聚糖包裹银纳米颗粒结合聚乙烯醇净化沼气膜的制备与表征

Advanced Materials Proceedings

Pub Date : 2020-04-01 DOI: 10.5185/amp.2019.7003

Akshay S Kulkarni

A solution technique was adopted to develop membranes in which chitosan-wrapped silver nanoparticles (CS-wrapped Ag nanoparticles) were incorporated in poly(vinyl alcohol) (PVA). The morphological studies and the chemical compositions of the prepared membranes were investigated using the characterization techniques like Infrared Spectroscopy, Differential scanning colorimetry, Wide Angle X-ray Diffraction, Thermogravimetric analysis and scanning electron microscopy. The effects of CS-wrapped Ag nanoparticles on membrane swelling were systematically studied to know the gas separation performance of the membranes. TGA showed increased thermal stability of Ag-nanoparticles incorporated PVA membranes nearly twice that of plane PVA membranes. Further, SEM revealed that CS-wrapped Ag nanoparticles incorporation into the PVA membrane matrix showed good compatibility and high swelling properties. Copyright © VBRI Press.

采用溶液法制备壳聚糖包覆银纳米粒子(cs包覆银纳米粒子)与聚乙烯醇(PVA)混合的膜。利用红外光谱、差示扫描比色法、广角x射线衍射、热重分析和扫描电镜等表征技术对制备的膜进行了形态研究和化学成分分析。系统研究了cs包覆银纳米粒子对膜膨胀的影响，以了解膜的气体分离性能。TGA结果表明，纳米银掺杂PVA膜的热稳定性提高了近两倍于平面PVA膜。此外，扫描电镜显示，cs包覆的银纳米颗粒掺入PVA膜基质中，具有良好的相容性和较高的溶胀性能。版权所有©VBRI出版社。

引用次数: 0

Cutting Edge Research in Advanced Materials to Transform the World 改造世界的先进材料前沿研究

Advanced Materials Proceedings

Pub Date : 2020-04-01 DOI: 10.5185/amp.2019.1002

Nidhi Chauhan

引用次数: 0

Photonic Crystal Film Preparation and Characterization for Chemical Sensing 用于化学传感的光子晶体薄膜制备与表征

Advanced Materials Proceedings

Pub Date : 2020-04-01 DOI: 10.5185/amp.2019.1463

M. Ye

Functionalized photonic crystal films were prepared for sensing small chemical molecules. First, silica nanospheres were self-assembled to form a colloidal crystal template within a mold. The interstitial space of this template was infiltrated by the hydrogel precursors, which were then allowed to polymerize. Upon removal of silica by hydrofluoric acid etching, a photonic crystal film, which produced a pink structural color, was formed. To add a chemical sensing functionality to the film, the molecules to be sensed were mixed with the hydrogel precursors for molecular imprinting; the amino acid proline was used for this purpose. Characterization of the functionalized photonic crystal film was conducted by optical reflectance measurements and imaging. The nanopores were imaged using SEM after cryogenic freezing of the film samples. Chemical sensing of proline was conducted on the film, with the reflectance peak shifting from 650 nm to 795 nm. Copyright © VBRI Press.

制备了用于传感小分子的功能化光子晶体薄膜。首先，二氧化硅纳米球在模具内自组装形成胶体晶体模板。该模板的间隙空间被水凝胶前体浸润，然后允许其聚合。在氢氟酸蚀刻去除二氧化硅后，形成了一种产生粉红色结构色的光子晶体膜。为了给薄膜增加化学传感功能，将被传感的分子与水凝胶前体混合进行分子印迹;氨基酸脯氨酸被用于此目的。通过光学反射率测量和成像对功能化光子晶体薄膜进行了表征。对薄膜样品进行低温冷冻后，利用扫描电镜对纳米孔进行成像。在膜上对脯氨酸进行了化学感应，反射峰从650 nm移至795 nm。版权所有©VBRI出版社。

引用次数: 0

Formation of Nitride by Electron-Beam Irradiation of Titanium in Nitrogen Media 钛在氮介质中电子束辐照形成氮化物的研究

Advanced Materials Proceedings

Pub Date : 2020-04-01 DOI: 10.5185/amp.2019.1454

A. Tyunkov, Y. Yushkov, D. Zolotukhin, E. Oks, D. A. Golosov, S. M. Zavadsky

This paper demonstrates the possibility of nitriding of titanium by a forevacuum electron source. We present an original design of the experimental setup and the measurements of the tribological properties and elemental composition of the subsurface layer of the titanium experimental sample. Raster electron microscopy analysis of the nitride sample have demonstrated that titanium and nitrogen are found to be the main chemical elements; oxygen and carbon also present, though their total concentration does not exceed 6 wt. %. The thickness of the modified layer after a 75-minute long process of nitriding was about 8 µm. Wear resistance test of have shown that the nitrided sample has a 500 times less loss of the material as compared with the original titanium sample, meaning a times-fold increase of resistance to wear.

本文论证了用前真空电子源氮化钛的可能性。我们提出了一种原始的实验装置设计，并测量了钛实验样品的亚表层的摩擦学性能和元素组成。对氮化样品的光栅电镜分析表明，钛和氮是主要的化学元素;氧和碳也存在，尽管它们的总浓度不超过6%。经过75分钟的渗氮处理后，改性层的厚度约为8µm。的耐磨性试验表明，与原始钛样品相比，氮化样品的材料损耗减少了500倍，这意味着耐磨性提高了1倍。

引用次数: 1

Smell Sensing and Classification by Machine Learning 机器学习的气味感知和分类

Advanced Materials Proceedings

Pub Date : 2020-04-01 DOI: 10.5185/amp.2019.1455

S. Omatu

This paper is concerned with smell sensing and classification using machine learning. Sensors used here is metal-oxide semi-conductor gas sensors and classification is machine learning. After explaining sensing principle, we show the classification results of coffee companies and kinds of coffees. Then their method apply to sensing and classification of human body smell so called Kunkun Body. The Kunkun Body can classify one of three human smells such as sweaty smell, middle-aged smell, and old-aged smell using four smell sensors. To train the Kunkun Body we gathered 2,100 persons who have one of three human body smells. We divide them into three groups according to each smell for human body and divide into 10 classes according to the density levels. The first stage for learning is to train the neural network of competitive learning to chemicals which are main components for human body smells. After pre-learning we settle the final values of weighting coefficients as the initial values. The real data for 2,100 persons are divided three groups for typical each smell and ten levels for strength. If the misclassification does not decrease, we adjust the structure of the neural network by increasing the number of neurons. When we can get high accuracy classification results, those weighting values will be stored and their values are used for Kunkun Body. Copyright © VBRI Press.

本文讨论了利用机器学习进行气味感知和分类。这里使用的传感器是金属氧化物半导体气体传感器，分类是机器学习。在解释了感知原理之后，我们给出了咖啡公司和咖啡种类的分类结果。将该方法应用于人体气味的感知与分类，称为“昆昆体”。“昆昆体”利用4个嗅觉传感器，可以对人体的汗味、中年味、老年味等3种气味进行分类。为了训练昆昆体，我们聚集了2100人，他们有三种人体气味中的一种。我们根据对人体的不同气味将其分为三组，根据密度高低将其分为10类。学习的第一阶段是对人体气味的主要成分化学物质进行竞争性学习神经网络的训练。在预学习之后，我们将权重系数的最终值作为初始值。2100人的真实数据被分为三组，代表典型的每一种气味，十个等级的强度。如果错误分类没有减少，我们通过增加神经元的数量来调整神经网络的结构。当我们可以得到较高精度的分类结果时，将这些权重值存储起来，并将其值用于昆昆体。版权所有©VBRI出版社。

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引用次数: 0

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