首页 > 最新文献

MatSciRN: Other Nanomaterials (Topic)最新文献

英文 中文
Aroma Detection of Ethanol Content in Fruits Using ZnO Doped Nano Thin Films 用ZnO掺杂纳米薄膜检测水果中乙醇的香气含量
Pub Date : 2019-02-24 DOI: 10.2139/ssrn.3351008
K. Ganapathy, Bhuvaneswari Balachander, A. S
The nano materials of Zinc Oxide (ZnO) were studied to exhibit excellent properties of semi conductors and are also used as nano wires and nano rods in varied applications. In the fields of aroma sensors, Zinc Oxide acts as a very good gas sensing agent. The Zinc Oxide has properties of changing electrical conductivity and resistance values when exposed to gas sensing atmosphere. This experimental research is to identify the changes in the resistivity values when exposed to ethanol vapors at different vapor pressures. The Zinc Oxide nano films are designed by dip coating process, which results in different resistance values when exposed on the ethanol vapors. The prepared thin film of Zinc Oxide is capable of detecting the presence of ethanol vapors when doped with PVA (poly vinyl alcohol) at 3% concentration. This produces efficient results and detects the presence of ethanol even at high and low vapor pressure.
研究了氧化锌(ZnO)的纳米材料具有优异的半导体性能,并在各种应用中用作纳米线和纳米棒。在香气传感器领域,氧化锌是一种非常好的气体感测剂。氧化锌在气敏气氛中具有改变电导率和电阻值的特性。本实验研究是为了确定在不同蒸汽压下乙醇蒸气暴露时电阻率值的变化。采用浸涂工艺设计了氧化锌纳米膜,其暴露在乙醇蒸气上时产生不同的电阻值。所制备的氧化锌薄膜在3%浓度的PVA(聚乙烯醇)掺杂下能够检测乙醇蒸气的存在。这产生有效的结果,并检测乙醇的存在,即使在高和低蒸气压。
{"title":"Aroma Detection of Ethanol Content in Fruits Using ZnO Doped Nano Thin Films","authors":"K. Ganapathy, Bhuvaneswari Balachander, A. S","doi":"10.2139/ssrn.3351008","DOIUrl":"https://doi.org/10.2139/ssrn.3351008","url":null,"abstract":"The nano materials of Zinc Oxide (ZnO) were studied to exhibit excellent properties of semi conductors and are also used as nano wires and nano rods in varied applications. In the fields of aroma sensors, Zinc Oxide acts as a very good gas sensing agent. The Zinc Oxide has properties of changing electrical conductivity and resistance values when exposed to gas sensing atmosphere. This experimental research is to identify the changes in the resistivity values when exposed to ethanol vapors at different vapor pressures. The Zinc Oxide nano films are designed by dip coating process, which results in different resistance values when exposed on the ethanol vapors. The prepared thin film of Zinc Oxide is capable of detecting the presence of ethanol vapors when doped with PVA (poly vinyl alcohol) at 3% concentration. This produces efficient results and detects the presence of ethanol even at high and low vapor pressure.<br>","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124091162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Co-Administration of Combretastatin A4 Nanoparticles and Sorafenib for Systemic Therapy of Hepatocellular Carcinoma 康布他汀A4纳米颗粒和索拉非尼联合应用于肝细胞癌的全身治疗
Pub Date : 2019-01-29 DOI: 10.2139/ssrn.3325395
Yalin Wang, Haiyang Yu, Dawei Zhang, Guanyi Wang, Wantong Song, Yingmin Liu, Sheng Ma, Zhaohui Tang, Ziling Liu, K. Sakurai, Xuesi Chen
Effective systemic therapy is highly desired for the treatment of hepatocellular carcinoma (HCC). In this study, a combination of nanoparticles of poly(L-glutamic acid)-graft-methoxy poly(ethylene glycol)/combretastatin A4 sodium salt (CA4-NPs) plus sorafenib is developed for the cooperative systemic treatment of HCC. The CA4-NPs leads to the disruption of established tumor blood vessels and extensive tumor necrosis, however, inducing increased expression of VEGF-A and angiogenesis. Sorafenib reduces the VEGF-A induced angiogenesis and further inhibits tumor proliferation, cooperating with the CA4-NPs. A significant decrease in tumor volume and prolonged survival time are observed in the combination group of CA4-NPs plus sorafenib compared with CA4-NPs or sorafenib monotherapy in subcutaneous and orthotopic H22 hepatic tumor models. Seventy-one percent of the mice are alive without residual tumor at 96 days post tumor inoculation for the subcutaneous models treated with CA4-NPs 30 or 35 mg·kg-1 plus sorafenib 30 mg·kg-1. Our findings suggest that co-administration of sorafenib and CA4-NPs possesses significant antitumor efficacy for HCC treatment. STATEMENT OF SIGNIFICANCE: Effective systemic therapy is highly desired for the treatment of hepatocellular carcinoma (HCC). Herein, we demonstrate that a combination of nanoparticles of poly(L-glutamic acid)-graft-methoxy poly(ethylene glycol)/combretastatin A4 sodium salt (CA4-NPs) plus sorafenib is a promising synergistic approach for systemic treatment of HCC. The CA4-NPs leads to the disruption of established tumor blood vessels and extensive tumor necrosis, however, inducing increased expression of VEGF-A and angiogenesis. Sorafenib reduces the VEGF-A induced angiogenesis and further inhibits tumor proliferation, cooperating with the CA4-NPs.
有效的全身治疗是治疗肝细胞癌(HCC)的迫切需要。本研究开发了聚(l -谷氨酸)-接枝-甲氧基聚(乙二醇)/combretastatin A4钠盐(CA4-NPs)纳米颗粒与索拉非尼(sorafenib)的组合,用于HCC的协同全身治疗。然而,CA4-NPs导致已建立的肿瘤血管破坏和广泛的肿瘤坏死,诱导VEGF-A表达增加和血管生成。Sorafenib与CA4-NPs协同作用,降低VEGF-A诱导的血管生成,进一步抑制肿瘤增殖。在皮下和原位H22肝肿瘤模型中,与CA4-NPs或索拉非尼单药治疗相比,CA4-NPs联合索拉非尼组肿瘤体积明显减小,生存时间明显延长。用CA4-NPs 30或35 mg·kg-1加索拉非尼30 mg·kg-1治疗的皮下模型,在肿瘤接种96 天后,71%的小鼠存活,无肿瘤残留。我们的研究结果表明索拉非尼和CA4-NPs联合使用对HCC治疗具有显著的抗肿瘤疗效。意义声明:有效的全身治疗是治疗肝细胞癌(HCC)的迫切需要。在这里,我们证明了聚(l -谷氨酸)-接枝-甲氧基聚乙二醇/combretastatin A4钠盐(CA4-NPs)纳米颗粒与索拉非尼的组合是一种有希望的全身治疗HCC的协同方法。然而,CA4-NPs导致已建立的肿瘤血管破坏和广泛的肿瘤坏死,诱导VEGF-A表达增加和血管生成。Sorafenib与CA4-NPs协同作用,降低VEGF-A诱导的血管生成,进一步抑制肿瘤增殖。
{"title":"Co-Administration of Combretastatin A4 Nanoparticles and Sorafenib for Systemic Therapy of Hepatocellular Carcinoma","authors":"Yalin Wang, Haiyang Yu, Dawei Zhang, Guanyi Wang, Wantong Song, Yingmin Liu, Sheng Ma, Zhaohui Tang, Ziling Liu, K. Sakurai, Xuesi Chen","doi":"10.2139/ssrn.3325395","DOIUrl":"https://doi.org/10.2139/ssrn.3325395","url":null,"abstract":"Effective systemic therapy is highly desired for the treatment of hepatocellular carcinoma (HCC). In this study, a combination of nanoparticles of poly(L-glutamic acid)-graft-methoxy poly(ethylene glycol)/combretastatin A4 sodium salt (CA4-NPs) plus sorafenib is developed for the cooperative systemic treatment of HCC. The CA4-NPs leads to the disruption of established tumor blood vessels and extensive tumor necrosis, however, inducing increased expression of VEGF-A and angiogenesis. Sorafenib reduces the VEGF-A induced angiogenesis and further inhibits tumor proliferation, cooperating with the CA4-NPs. A significant decrease in tumor volume and prolonged survival time are observed in the combination group of CA4-NPs plus sorafenib compared with CA4-NPs or sorafenib monotherapy in subcutaneous and orthotopic H22 hepatic tumor models. Seventy-one percent of the mice are alive without residual tumor at 96 days post tumor inoculation for the subcutaneous models treated with CA4-NPs 30 or 35 mg·kg-1 plus sorafenib 30 mg·kg-1. Our findings suggest that co-administration of sorafenib and CA4-NPs possesses significant antitumor efficacy for HCC treatment. STATEMENT OF SIGNIFICANCE: Effective systemic therapy is highly desired for the treatment of hepatocellular carcinoma (HCC). Herein, we demonstrate that a combination of nanoparticles of poly(L-glutamic acid)-graft-methoxy poly(ethylene glycol)/combretastatin A4 sodium salt (CA4-NPs) plus sorafenib is a promising synergistic approach for systemic treatment of HCC. The CA4-NPs leads to the disruption of established tumor blood vessels and extensive tumor necrosis, however, inducing increased expression of VEGF-A and angiogenesis. Sorafenib reduces the VEGF-A induced angiogenesis and further inhibits tumor proliferation, cooperating with the CA4-NPs.","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131543488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 30
Influence of Microstructural Features on the Plastic Deformation Behavior of Metallic Nanoglasses 微观结构特征对金属纳米玻璃塑性变形行为的影响
Pub Date : 2018-12-02 DOI: 10.2139/ssrn.3300055
O. Adjaoud, K. Albe
Abstract We investigate the influence of microstructural properties on the plastic deformation behavior of Cu64 Zr36 nanoglasses by means of molecular dynamics simulations. Two different setups are used to prepare nanoglasses. One sample type is a nanoglass obtained by cold-compaction of chemically homogenous and inhomogenous nanoparticles. The second type is generated by assembling pre-shaped polyhedral cuts from the bulk phase. A detailed analysis of both types of microstructures shows that the volume fraction of interfaces in the particle-derived nanoglasses is significantly higher than in the bulk-derived nanoglasses with the same average grain size. The simulations also reveal a clearly distinct plastic response on uniaxial loading: The particle derived samples do not show a stress drop upon yielding, very little strain localization and no strain softening, whereas the bulk-derived samples exhibit a stress drop, strain softening and large strain localization upon loading. These findings are explained in terms of the different glass-glass interfaces present in both structure types. Our results therefore show that the macroscopic deformation behavior of metallic nanoglasses is intimately linked to the structure and topology of the glass-glass interfaces which in turn depend on the processing route.
摘要采用分子动力学模拟方法研究了Cu64 Zr36纳米玻璃的微观组织性能对其塑性变形行为的影响。两种不同的装置用于制备纳米玻璃。一种样品类型是通过冷压化学均质和非均质纳米颗粒获得的纳米玻璃。第二种类型是通过从体相组装预先成型的多面体切割而产生的。对两种微观结构的详细分析表明,在平均晶粒尺寸相同的情况下,颗粒衍生纳米玻璃中界面的体积分数明显高于块体衍生纳米玻璃。模拟还揭示了单轴加载下明显不同的塑性响应:颗粒衍生样品在屈服时不表现出应力下降,应变局部化很小,没有应变软化,而体衍生样品在加载时表现出应力下降,应变软化和大应变局部化。这些发现是根据两种结构类型中存在的不同玻璃-玻璃界面来解释的。因此,我们的研究结果表明,金属纳米玻璃的宏观变形行为与玻璃-玻璃界面的结构和拓扑结构密切相关,而结构和拓扑结构又取决于加工路线。
{"title":"Influence of Microstructural Features on the Plastic Deformation Behavior of Metallic Nanoglasses","authors":"O. Adjaoud, K. Albe","doi":"10.2139/ssrn.3300055","DOIUrl":"https://doi.org/10.2139/ssrn.3300055","url":null,"abstract":"Abstract We investigate the influence of microstructural properties on the plastic deformation behavior of Cu64 Zr36 nanoglasses by means of molecular dynamics simulations. Two different setups are used to prepare nanoglasses. One sample type is a nanoglass obtained by cold-compaction of chemically homogenous and inhomogenous nanoparticles. The second type is generated by assembling pre-shaped polyhedral cuts from the bulk phase. A detailed analysis of both types of microstructures shows that the volume fraction of interfaces in the particle-derived nanoglasses is significantly higher than in the bulk-derived nanoglasses with the same average grain size. The simulations also reveal a clearly distinct plastic response on uniaxial loading: The particle derived samples do not show a stress drop upon yielding, very little strain localization and no strain softening, whereas the bulk-derived samples exhibit a stress drop, strain softening and large strain localization upon loading. These findings are explained in terms of the different glass-glass interfaces present in both structure types. Our results therefore show that the macroscopic deformation behavior of metallic nanoglasses is intimately linked to the structure and topology of the glass-glass interfaces which in turn depend on the processing route.","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124501004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Improving Human Health at the Atomic Level: A Bibliographic Survey of Nanomedicine 在原子水平上改善人类健康:纳米医学的书目调查
Pub Date : 2016-09-01 DOI: 10.2139/ssrn.2835844
D. Stirling
This monograph provides a brief historical review of nanotechnology and its role in nanomedicine followed by a concise but thorough and subject oriented guide to key nanomedicine literature.
本专著提供了纳米技术及其在纳米医学中的作用的简要历史回顾,然后是一个简洁但彻底和主题导向的关键纳米医学文献指南。
{"title":"Improving Human Health at the Atomic Level: A Bibliographic Survey of Nanomedicine","authors":"D. Stirling","doi":"10.2139/ssrn.2835844","DOIUrl":"https://doi.org/10.2139/ssrn.2835844","url":null,"abstract":"This monograph provides a brief historical review of nanotechnology and its role in nanomedicine followed by a concise but thorough and subject oriented guide to key nanomedicine literature.","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132548581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nano Biosensors Containing Non-Carbon-Based Nanomaterials to Access Environmental Pollution Level 含非碳基纳米材料的纳米生物传感器接近环境污染水平
Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3869459
Dr. Vishnu Kiran Manam
The world of sensing technology is expanding into new horizons owing to its exceptional selectivity and sensitivity-based applicability. This remarkable sensing progress has been positively influenced by the conjugation of biology, material sciences, and nanotechnology into an advanced sensing technology. The combination of biology with nanotechnology has allowed sensing technology to enable faster, cheaper, and more reliable evaluations and applications in various scientific domains. Thus, a new era in sensing has been developed into nano biosensing technology. Environmental monitoring, various processes assessment, contaminates detections, and complex environmental forensics are among the most promising applications of nanobiosensors and thus a thrust area of research. In this regard, the nanobiosensors containing non-carbon nanomaterials such as metals, metal oxides, their composites, non-metals other than carbon, and their conjugations, etc. have been flocking significant attention to remarkable potential in this thrust area of environmental science and research. Thus the present chapter highlights the role and importance of non-carbon-based nanobiosensors, their recent advancements, and the major factors that made the non-carbon-based nanobiosensors a preferential and successful choice in nano biosensing technologies. The chapter highlights the environmental applications of non-carbon-based nanobiosensors and the key future challenges associated with this technology.
传感技术由于其特殊的选择性和基于灵敏度的适用性,正在扩展到新的领域。生物学、材料科学和纳米技术结合成为一种先进的传感技术,这一显著的传感进展受到了积极的影响。生物学与纳米技术的结合使得传感技术能够在各种科学领域中实现更快、更便宜和更可靠的评估和应用。因此,纳米生物传感技术已经发展成为传感领域的一个新时代。环境监测、各种过程评估、污染检测和复杂的环境取证是纳米生物传感器最有前途的应用,因此是研究的重点领域。在这方面,含有非碳纳米材料的纳米生物传感器,如金属、金属氧化物、其复合材料、非碳非金属及其偶联物等,在这一环境科学与研究的重点领域具有巨大的潜力,受到了人们的广泛关注。因此,本章强调了非碳基纳米生物传感器的作用和重要性,它们的最新进展,以及使非碳基纳米生物传感器成为纳米生物传感技术中首选和成功选择的主要因素。本章重点介绍了非碳基纳米生物传感器的环境应用以及与该技术相关的关键未来挑战。
{"title":"Nano Biosensors Containing Non-Carbon-Based Nanomaterials to Access Environmental Pollution Level","authors":"Dr. Vishnu Kiran Manam","doi":"10.2139/ssrn.3869459","DOIUrl":"https://doi.org/10.2139/ssrn.3869459","url":null,"abstract":"The world of sensing technology is expanding into new horizons owing to its exceptional selectivity and sensitivity-based applicability. This remarkable sensing progress has been positively influenced by the conjugation of biology, material sciences, and nanotechnology into an advanced sensing technology. The combination of biology with nanotechnology has allowed sensing technology to enable faster, cheaper, and more reliable evaluations and applications in various scientific domains. Thus, a new era in sensing has been developed into nano biosensing technology. Environmental monitoring, various processes assessment, contaminates detections, and complex environmental forensics are among the most promising applications of nanobiosensors and thus a thrust area of research. In this regard, the nanobiosensors containing non-carbon nanomaterials such as metals, metal oxides, their composites, non-metals other than carbon, and their conjugations, etc. have been flocking significant attention to remarkable potential in this thrust area of environmental science and research. Thus the present chapter highlights the role and importance of non-carbon-based nanobiosensors, their recent advancements, and the major factors that made the non-carbon-based nanobiosensors a preferential and successful choice in nano biosensing technologies. The chapter highlights the environmental applications of non-carbon-based nanobiosensors and the key future challenges associated with this technology.","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130834918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
In situ TEM Study of Size Dependence on Radiation-Induced Amorphization and Recrystallization of Hydroxyapatite Nanoparticles 辐射诱导羟基磷灰石纳米颗粒非晶化和再结晶的尺寸依赖性原位透射电镜研究
Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3818059
Jianren Zhou, M. Kirk, P. Baldo, Fengyuan Lu
Hydroxyapatite, Ca10(PO4) 6(OH)2, is considered as an important apatite-type material for the incorporation and disposal of actinides and fission products. Hydroxyapatite nanoparticles with different size ranging from 20 nm to 280 nm were synthesized via calcining the bovine bones under different temperatures and durations. The samples are irradiated with 1 MeV Kr2+ ions and 200 keV electrons to study the displacive and ionizing effects on the irradiation behaviors. In situ transmission electron microscopy (TEM) observation shows hydroxyapatite nanoparticles can be amorphized by 1 MeV Kr2+ ions and the previously amorphized samples experience a rapid ionizing-radiation-induced recrystallization upon 200 keV electrons irradiation. A strong size dependence on the displacive irradiation-induced amorphization and ionizing irradiation-induced recrystallization are observed. Under ion irradiation, a lower critical temperature T c is observed for a larger sized sample, indicating enhanced amorphization tolerance. This result indicates excess surface energy as a result of larger surface area resulting from the reduced size, may lower the energy barrier between the crystalline phase and amorphous state, degrading the radiation tolerance. Whereas under electron irradiation, the recrystallization fluences decrease with the reduction of particle size since a higher density of dangling bonds exist in a smaller sized hydroxyapatite. These unstable bonds are relatively easy to break and reforming under ionizing electron irradiation, which drives the recrystallization process.
羟基磷灰石Ca10(PO4) 6(OH)2被认为是锕系元素和裂变产物结合和处置的重要磷灰石型物质。通过对牛骨进行不同温度和时间的煅烧,合成了20 ~ 280 nm大小的羟基磷灰石纳米颗粒。用1mev的Kr2+离子和200kev的电子对样品进行辐照,研究了位移效应和电离效应对辐照行为的影响。原位透射电镜(TEM)观察表明,1 MeV的Kr2+离子可以使羟基磷灰石纳米颗粒非晶化,在200 keV的电子辐照下,非晶化的样品经历了电离辐射诱导的快速再结晶。位移辐照诱导的非晶化和电离辐照诱导的再结晶对尺寸有很强的依赖性。在离子辐照下,大尺寸样品的临界温度T c较低,表明非晶化耐受性增强。这一结果表明,由于尺寸减小导致表面积增大而产生的过剩表面能可能降低晶相和非晶态之间的能垒,从而降低辐射耐受性。而在电子辐照下,再结晶影响随着粒径的减小而减小,因为较小尺寸的羟基磷灰石中存在更高密度的悬空键。这些不稳定的键在电离电子照射下相对容易断裂和重整,从而驱动再结晶过程。
{"title":"In situ TEM Study of Size Dependence on Radiation-Induced Amorphization and Recrystallization of Hydroxyapatite Nanoparticles","authors":"Jianren Zhou, M. Kirk, P. Baldo, Fengyuan Lu","doi":"10.2139/ssrn.3818059","DOIUrl":"https://doi.org/10.2139/ssrn.3818059","url":null,"abstract":"Hydroxyapatite, Ca<sub>10</sub>(PO<sub>4</sub>) <sub>6</sub>(OH)<sub>2</sub>, is considered as an important apatite-type material for the incorporation and disposal of actinides and fission products. Hydroxyapatite nanoparticles with different size ranging from 20 nm to 280 nm were synthesized via calcining the bovine bones under different temperatures and durations. The samples are irradiated with 1 MeV Kr<sup>2+</sup> ions and 200 keV electrons to study the displacive and ionizing effects on the irradiation behaviors. <i>In situ</i> transmission electron microscopy (TEM) observation shows hydroxyapatite nanoparticles can be amorphized by 1 MeV Kr<sup>2+</sup> ions and the previously amorphized samples experience a rapid ionizing-radiation-induced recrystallization upon 200 keV electrons irradiation. A strong size dependence on the displacive irradiation-induced amorphization and ionizing irradiation-induced recrystallization are observed. Under ion irradiation, a lower critical temperature <i>T <sub>c</sub> </i> is observed for a larger sized sample, indicating enhanced amorphization tolerance. This result indicates excess surface energy as a result of larger surface area resulting from the reduced size, may lower the energy barrier between the crystalline phase and amorphous state, degrading the radiation tolerance. Whereas under electron irradiation, the recrystallization fluences decrease with the reduction of particle size since a higher density of dangling bonds exist in a smaller sized hydroxyapatite. These unstable bonds are relatively easy to break and reforming under ionizing electron irradiation, which drives the recrystallization process.","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116200896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tunable Large Recovery Strain and Wide Response Temperature with Near-Zero Response Interval in Cu-Al-Mn-Fe Single Crystals Cu-Al-Mn-Fe单晶可调大恢复应变和近零响应区间宽响应温度
Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3494608
Shuiyuan Yang, Lipeng Guo, X. Qing, S. Hong, Ji-xun Zhang, Yuhua Wen, Cuiping Wang, Xingjun Liu
Shape memory alloys can recover the deformed shape due to their superelasticity or shape memory effect. Generally, in one shape memory alloy either the superelasticity or shape memory effect can be displayed under a certain temperature, depending on the relationship between the martensitic transformation and deformation temperature. Here we report novel Cu-Al-Mn-Fe shape memory material simultaneously showing excellent superelasticity and shape memory effect at room temperature, as well as tunably wide response temperature range with near-zero interval of reverse phase transformation by deformation. When deforming one single crystal at room temperature, it not only possesses full superelasticity of 7%, but also tunable shape memory effects up to 8.8%. The full shape recovery during heating exhibits near-zero response interval and tunably wide response temperature range of 166 K depending on the deformation. The functional characteristics of the alloys result from the controllable reverse phase transformation hinging on the stabilization of stress-induced martensite induced by completely coherent nanoparticles during deformation. This class of Cu-Al-Mn-Fe alloys may be used as both superelastic materials, and shape memory materials with wide working temperature range as high-sensitive detector, driver or sensor.
形状记忆合金由于具有超弹性或形状记忆效应,可以恢复变形后的形状。一般情况下,在一定温度下,一种形状记忆合金要么表现出超弹性效应,要么表现出形状记忆效应,这取决于马氏体相变与变形温度之间的关系。本文报道了一种新型Cu-Al-Mn-Fe形状记忆材料,该材料在室温下同时表现出优异的超弹性和形状记忆效应,并且具有可调的宽响应温度范围和接近零的变形反向相变间隔。当单晶在室温下变形时,它不仅具有7%的完全超弹性,而且具有高达8.8%的可调形状记忆效应。加热过程中的完全形状恢复表现出接近于零的响应区间和根据变形可调的宽响应温度范围为166 K。合金的功能特征是基于完全相干纳米颗粒在变形过程中诱导的应力诱发马氏体的稳定,从而实现了可控的反向相变。这类Cu-Al-Mn-Fe合金既可以作为超弹性材料,也可以作为宽工作温度范围的形状记忆材料,用作高灵敏度的探测器、驱动器或传感器。
{"title":"Tunable Large Recovery Strain and Wide Response Temperature with Near-Zero Response Interval in Cu-Al-Mn-Fe Single Crystals","authors":"Shuiyuan Yang, Lipeng Guo, X. Qing, S. Hong, Ji-xun Zhang, Yuhua Wen, Cuiping Wang, Xingjun Liu","doi":"10.2139/ssrn.3494608","DOIUrl":"https://doi.org/10.2139/ssrn.3494608","url":null,"abstract":"Shape memory alloys can recover the deformed shape due to their superelasticity or shape memory effect. Generally, in one shape memory alloy either the superelasticity or shape memory effect can be displayed under a certain temperature, depending on the relationship between the martensitic transformation and deformation temperature. Here we report novel Cu-Al-Mn-Fe shape memory material simultaneously showing excellent superelasticity and shape memory effect at room temperature, as well as tunably wide response temperature range with near-zero interval of reverse phase transformation by deformation. When deforming one single crystal at room temperature, it not only possesses full superelasticity of 7%, but also tunable shape memory effects up to 8.8%. The full shape recovery during heating exhibits near-zero response interval and tunably wide response temperature range of 166 K depending on the deformation. The functional characteristics of the alloys result from the controllable reverse phase transformation hinging on the stabilization of stress-induced martensite induced by completely coherent nanoparticles during deformation. This class of Cu-Al-Mn-Fe alloys may be used as both superelastic materials, and shape memory materials with wide working temperature range as high-sensitive detector, driver or sensor.","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124922440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Twisting of Pre-Twinned Alpha-Fe Nanowires: From Mild to Wild Avalanche Dynamics 预孪生α - fe纳米线的扭曲:从温和到野生雪崩动力学
Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3542918
Yang Yang, Suzhi Li, Xiangdong Ding, Jun Sun, J. Weiss, E. Salje
Alpha-Fe nanowires are seeded with twin walls (TBs) with orientations perpendicular to the wire direction. Twisting the wire generates topological defects in the twin walls, namely new twin boundaries (kinks) inside the twin walls for small twist angles, and junctions between kinks for large twist angles. During twisting the kink motion is jerky and uncorrelated at small twisting angles. The probability density function (PDF) of jerk energies follows approximately a Gaussian distribution, indicating a mild deformation mode. The kink dynamics transforms from mild to wild at larger twist angles when complex twin patterns with a high density of junctions are generated. The collective motion of kinks now shows avalanche behavior with the energy being power-law distributed. The wildness, which measures the proportion of strain energy relaxed through such avalanches, is correlated with the junction density, and controlled by the external length scale (wire diameter) as well as an internal length scale (twin boundary spacing). Good strain-stress recoverability is achieved when unloading the wire before the formation of complex twin patterns. We correlate the evolution of twin patterns with a statistical analysis of jerk dynamics, which identifies the unique mechanical properties governed by twin boundary motion in nanowires.
α - fe纳米线采用垂直于线方向的双壁(TBs)播种。扭转金属丝会在双壁中产生拓扑缺陷,即小扭角时双壁内部产生新的孪晶界(扭结),大扭角时扭结之间产生结。在扭转过程中,扭结运动在小的扭转角度下是不稳定和不相关的。振动能量的概率密度函数(PDF)近似服从高斯分布,表现为轻微的变形模式。当产生具有高密度结的复杂孪晶图案时,在较大的扭转角下扭结动力学由轻微转变为剧烈。扭结的集体运动现在表现出雪崩行为,能量呈幂律分布。野度测量的是通过这种雪崩而松弛的应变能的比例,野度与结密度相关,并受外部长度尺度(线径)和内部长度尺度(孪晶界间距)的控制。在复杂孪晶形成前卸载金属丝,可获得良好的应变应力恢复性。我们将孪晶图案的演变与激振动力学的统计分析联系起来,从而确定了纳米线中孪晶边界运动所支配的独特力学性能。
{"title":"Twisting of Pre-Twinned Alpha-Fe Nanowires: From Mild to Wild Avalanche Dynamics","authors":"Yang Yang, Suzhi Li, Xiangdong Ding, Jun Sun, J. Weiss, E. Salje","doi":"10.2139/ssrn.3542918","DOIUrl":"https://doi.org/10.2139/ssrn.3542918","url":null,"abstract":"Alpha-Fe nanowires are seeded with twin walls (TBs) with orientations perpendicular to the wire direction. Twisting the wire generates topological defects in the twin walls, namely new twin boundaries (kinks) inside the twin walls for small twist angles, and junctions between kinks for large twist angles. During twisting the kink motion is jerky and uncorrelated at small twisting angles. The probability density function (PDF) of jerk energies follows approximately a Gaussian distribution, indicating a mild deformation mode. The kink dynamics transforms from mild to wild at larger twist angles when complex twin patterns with a high density of junctions are generated. The collective motion of kinks now shows avalanche behavior with the energy being power-law distributed. The wildness, which measures the proportion of strain energy relaxed through such avalanches, is correlated with the junction density, and controlled by the external length scale (wire diameter) as well as an internal length scale (twin boundary spacing). Good strain-stress recoverability is achieved when unloading the wire before the formation of complex twin patterns. We correlate the evolution of twin patterns with a statistical analysis of jerk dynamics, which identifies the unique mechanical properties governed by twin boundary motion in nanowires.","PeriodicalId":326657,"journal":{"name":"MatSciRN: Other Nanomaterials (Topic)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129003165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
期刊
MatSciRN: Other Nanomaterials (Topic)
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1