EngRN: Micro & Nano Technologies & Materials (Topic)最新文献

Armchair Graphene Nanoribbon-Based Spin Caloritronics 扶手椅石墨烯纳米带自旋热电子

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2022-02-01 DOI: 10.2139/ssrn.3929880

Hong-Li Zeng, Li Yang, Yandong Guo, Jing-Jing He, Yue Jiang, Liyan Lin, Xiaohong Yan

引用次数: 2

Microstructure Classification in the Unsupervised Context 无监督环境下的微观结构分类

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2021-11-01 DOI: 10.2139/ssrn.3683591

C. Kunselman, Sofia Z. Sheikh, Madalyn Mikkelsen, V. Attari, R. Arróyave

{"title":"Microstructure Classification in the Unsupervised Context","authors":"C. Kunselman, Sofia Z. Sheikh, Madalyn Mikkelsen, V. Attari, R. Arróyave","doi":"10.2139/ssrn.3683591","DOIUrl":"https://doi.org/10.2139/ssrn.3683591","url":null,"abstract":"Traditional microstructure classification requires human annotations provided by a subject matter expert. The requirement of human input is both costly and subjective and cannot keep up with the current volume of experimentally and computationally generated microstructure images. In this work, we develop a framework that is capable of reducing the cost of human annotation in this process by leveraging novel machine learning procedures for class discovery and label assignment. To reduce the penalty of a poor label assignment made by this automated process, labels are only assigned to high-confidence observations while ambiguous data are left unlabeled. Semi-supervised classification is then employed to leverage the high- and low-confidence label assignments, and a novel generalization of an established semi-supervised error estimation technique to the multi-class context is introduced to assess the resulting classifiers. Finally, it is shown that this framework can be used to produce highly accurate classifiers over microstructure image class taxonomies which are discovered solely through data-driven methods and which display consistent structural trends within and distinct morphological differences between classes.","PeriodicalId":309999,"journal":{"name":"EngRN: Micro & Nano Technologies & Materials (Topic)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129365737","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: 9

Unzipping Chemical Bonds of Non-Layered Bulk Structures to Form Ultrathin Nanocrystals 解开非层状体结构的化学键以形成超薄纳米晶体

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2020-09-08 DOI: 10.2139/ssrn.3713491

Liangxu Lin, Na Xu, Chang Wu, Juntong Huang, A. Nattestad, Xuelin Zheng, G. Wallace, Shaowei Zhang, Jun Chen

{"title":"Unzipping Chemical Bonds of Non-Layered Bulk Structures to Form Ultrathin Nanocrystals","authors":"Liangxu Lin, Na Xu, Chang Wu, Juntong Huang, A. Nattestad, Xuelin Zheng, G. Wallace, Shaowei Zhang, Jun Chen","doi":"10.2139/ssrn.3713491","DOIUrl":"https://doi.org/10.2139/ssrn.3713491","url":null,"abstract":"The rich electronic and band structures of monolayered crystals distinguished from their layered bulk counterparts offer versatile physical/chemical properties and applications.1-5 Their fabrications, particularly the top-down \"exfoliations\", are successful promised by the weak Van der Waals force between monolayers.6-9 Differentially, un-zipping ultra-thin crystals (e.g. with only one layer of crystal plane) from non-layered structures is highly challenging due to the strong chemical bond between planes and atoms. Alterative finely controlled growth of these ultra-thin materials is not really successful. This work demonstrates how a technique can be used to unzip and disintegrate ultra-thin crystal plane (e.g. monolayered nanocrystals and nanosheets) from bulk non-layered structures (ZnO, alpha/belta-MnO2, TiO2, alpha-TiB2), and present how the basic optical properties changed to distinguish from their bulk phases. The work here gives a strong tool kit to various novel 2D non-layered nanomaterials, providing significant contributions to the family of two-dimensional materials, potentially paving the way for various practical applications.","PeriodicalId":309999,"journal":{"name":"EngRN: Micro & Nano Technologies & Materials (Topic)","volume":"376 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122349058","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: 6

Twin Boundary Sliding in Single Crystalline Cu and Al Nanowires 单晶铜和铝纳米线的双边界滑动

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2020-09-01 DOI: 10.2139/ssrn.3513123

Sung-Hoon Kim, Junhyeok Park, Hong-Kyu Kim, Jae-pyoung Ahn, D. Whang, Jae‐Chul Lee

{"title":"Twin Boundary Sliding in Single Crystalline Cu and Al Nanowires","authors":"Sung-Hoon Kim, Junhyeok Park, Hong-Kyu Kim, Jae-pyoung Ahn, D. Whang, Jae‐Chul Lee","doi":"10.2139/ssrn.3513123","DOIUrl":"https://doi.org/10.2139/ssrn.3513123","url":null,"abstract":"Abstract Twin boundary sliding (TBS) is a deformation mode that is typically observed in nanocrystalline metals and usually occurs at multiple locations in the twinned region, including twin boundaries, of a crystal in a situation in which additional deformation via twinning is limited. Unlike the well-established dislocation slip and necking deformation process that occurs in large crystals, recent theories that explain TBS are often controversial, and much remains unsettled. Herein, we develop a factor that enables the prediction of deformation pathways by quantitatively analyzing the relative tendency for the formation of partial dislocations based on the dislocation and fault energy theories. The developed factor considers the effects of static/extrinsic features, such as the stacking fault energy (SFE) as well as the crystal size and orientation, and dynamic structural states characterized by the various fault energies of a material. The factor is initially validated using a Cu crystal exhibiting low SFE for various orientations and sizes. To determine whether the proposed factor can be generically extended to crystals with high SFE, we perform micro-mechanical tensile tests and molecular dynamics simulations on Al nanowires. The developed factor produces self-consistent results even for metals exhibiting different SFE values. The observations can be used as a guideline to design nanoscale structures for load-carrying applications.","PeriodicalId":309999,"journal":{"name":"EngRN: Micro & Nano Technologies & Materials (Topic)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134096258","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: 11

Heteroatom Doped Carbon Dots with Nanoenzyme Like Properties as Theranostic Platforms for Free Radical Scavenging, Imaging, and Chemotherapy 具有纳米酶样特性的杂原子掺杂碳点作为自由基清除、成像和化疗的治疗平台

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2020-07-15 DOI: 10.2139/ssrn.3527826

K. Dehvari, Sheng-Hui Chiu, Jin-Sheng Lin, Wubshet Mekonnen Girma, Y. Ling, Jia-Yaw Chang

{"title":"Heteroatom Doped Carbon Dots with Nanoenzyme Like Properties as Theranostic Platforms for Free Radical Scavenging, Imaging, and Chemotherapy","authors":"K. Dehvari, Sheng-Hui Chiu, Jin-Sheng Lin, Wubshet Mekonnen Girma, Y. Ling, Jia-Yaw Chang","doi":"10.2139/ssrn.3527826","DOIUrl":"https://doi.org/10.2139/ssrn.3527826","url":null,"abstract":"Carbon-based artificial nanoenzymes have gained increasing interest as emerging and promising nanotheranostic agents due to their biocompatibility, low cost, and straightforward production. Herein, a multifunctional Mn, N, and S incorporated carbon quantum dots (MnNS:CDs) exhibiting scavenging activity against reactive oxygen species (ROS) and reactive nitrogen species (RNS), photoluminescence quantum yield of 17.7 %, and magnetic resonance imaging (MRI) contrast was explored. The optical, magnetic, and antioxidant properties of MnNS:CDs were then regulated by control over Mn incorporation to achieve higher photostability and antioxidant properties. Furthermore, conjugation of MnNS:CDs with hyaluronic acid (HA) (denoted as MnNS:CDs@HA) endowed them with high biocompatibility, which is validated by in vivo studies on zebrafish, and the ability to specifically target cluster determinant 44 (CD44)-overexpressing B16F1 cells, as verified by in vitro confocal and MRI studies. The MnNS:CDs@HA probe with therapeutic antioxidant and dual-modal imaging capability was further assessed for non-covalent binding of doxorubicin (DOX) as a model chemotherapeutic cancer drug. Results showed that targeted delivery and pH-dependent release of DOX elicited apparent cell toxicity (90%) toward B16F1 cancer cells when compared to free DOX treatment group (60%). Benefiting from their intrinsic antioxidant properties, and dual-modal imaging ability, the MnNS:CDs@HA nanocarrier is projected to improve non-invasive targeted diagnosis and therapy.","PeriodicalId":309999,"journal":{"name":"EngRN: Micro & Nano Technologies & Materials (Topic)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116357628","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: 43

Dual-Modal Imaging-Guided Theranostic Nanocarriers Based on 2-Methoxyestradiol and Indocyanine Green 基于2-甲氧基雌二醇和吲哚菁绿的双模成像引导治疗纳米载体

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2020-06-23 DOI: 10.2139/ssrn.3627994

Nan Zhang, Yue Xu, Xiangying Xin, Pengchao Huo, Yan Zhang, Hui Chen, Nan Feng, Quanling Feng, Zhenzhong Zhang

{"title":"Dual-Modal Imaging-Guided Theranostic Nanocarriers Based on 2-Methoxyestradiol and Indocyanine Green","authors":"Nan Zhang, Yue Xu, Xiangying Xin, Pengchao Huo, Yan Zhang, Hui Chen, Nan Feng, Quanling Feng, Zhenzhong Zhang","doi":"10.2139/ssrn.3627994","DOIUrl":"https://doi.org/10.2139/ssrn.3627994","url":null,"abstract":"The effect of a chemotherapeutic drug is always limited by insufficient drug dose and drug toxicity. However, when tumor cells are exposed to the maximum concentration of a chemotherapeutic drug, the best effect can be achieved. Here we developed a strategy (graphic summary) to enhance the therapeutic and diagnostic capabilities of known chemotherapeutics. We used a dual-mode near-infrared (NIR) fluorescence/photoacoustic imaging technology to actively guide the photothermal therapeutic agent indocyanine green (ICG) and a chemotherapeutic drug 2-methoxyestradiol (2-ME) loaded into thermosensitive liposomes (TSLs), on the surfaces of which was grafted the tumor-targeting peptide cRGDyk, (cRGDyk-2-ME@ICG-TSL) to the tumor target. Drug release studies have shown that TSL has a satisfactory performance for targeting and releasing 2-ME under the high temperature conditions induced by NIR laser irradiation. In vitro studies confirmed that cRGDyk-2-ME@ICG-TSLs can effectively induce drug accumulation and cytotoxicity in B16-F10 melanoma cells under near-infrared laser irradiation using cRGDyk peptide and temperature-sensitive dual targeting. Twenty-four hours after the intravenous injection of cRGDyk-2-ME@ICG-TSLs into melanoma tumor-bearing mice, dual-mode NIR fluorescence/photoacoustic imaging could accurately identify tumors and normal tissues. In addition, the combination of cRGDyk-2-ME@ICG-TSLs and NIR radiation suppressed tumor growth in nude mice bearing tumors and was associated with a lower risk of side effects on normal organs. Our results indicate that TSLs can increase the therapeutic index of chemotherapeutic drugs and is suitable as a drug delivery system for diagnostic and tumor treatment tools guided by dual-mode imaging.","PeriodicalId":309999,"journal":{"name":"EngRN: Micro & Nano Technologies & Materials (Topic)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116663243","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

Review on Green Synthesis of ZnO Nano Particles and their Applications 氧化锌纳米颗粒绿色合成及其应用研究进展

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2020-02-20 DOI: 10.2139/ssrn.3541374

Ananya Barman, Tanmoy Dutta, Ayush Khamrui, A. Basu

引用次数: 1

Graphitic Carbon Nitride G-C 4N 3 a Potential Nano-Capacitor 石墨氮化碳g - c4n3 -电位纳米电容器

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2020-01-02 DOI: 10.2139/ssrn.3512734

S. Sen, Rinki Bhowmick

引用次数: 0

Polymer Template Synthesis of Soft and Light Oxide Ceramics as Battery Separators 软、轻氧化物陶瓷用作电池隔膜的聚合物模板合成

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 2019-02-15 DOI: 10.2139/ssrn.3334981

Jianhua Yan, Yun Zhao, Shuhui Xia, Xiao Wang, Yuanyuan Zhang, Yuhui Han, Jianyong Yu, B. Ding

{"title":"Polymer Template Synthesis of Soft and Light Oxide Ceramics as Battery Separators","authors":"Jianhua Yan, Yun Zhao, Shuhui Xia, Xiao Wang, Yuanyuan Zhang, Yuhui Han, Jianyong Yu, B. Ding","doi":"10.2139/ssrn.3334981","DOIUrl":"https://doi.org/10.2139/ssrn.3334981","url":null,"abstract":"Oxide ceramics are attractive separator materials due to their robust mechanical strength and exceptional thermal and chemical stability, but manufacturing soft oxide ceramic films is a big challenge due to the inherent brittleness of ceramics. However, we have fabricated a range of oxide ceramic nanofiber films that exhibit significant softness without fragility after various deformations by developing a sol-gel electrospinning technology followed by calcination. This approach causes the ceramic crystals to fuse together at a low temperature during their growth within the polymer nanofiber templates. All of the created oxide ceramics, from SiO2 to BaTiO3, Li0.33La0.56TiO3 and Li7La3Zr2O12, have silk-like softness of <31 mN, flyweight density of <0.36 g/cm3 and robust fire-resistance to 1000 °C. Fabricated separators based on these films display high liquid electrolyte uptakes of >900% and thermal-insulation performance, enhancing the rate capability and safety of Li-batteries. The reported approach allows low-cost and scalable synthesis of oxide ceramic films that possess both soft and rigid properties.","PeriodicalId":309999,"journal":{"name":"EngRN: Micro & Nano Technologies & Materials (Topic)","volume":"291 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121083244","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

Embedding Single Platinum Atoms Into Nickel Nanoparticles Affords Highly Selective Catalysts for Lignin Conversion 将单个铂原子嵌入到镍纳米颗粒中为木质素转化提供了高选择性催化剂

EngRN: Micro & Nano Technologies & Materials (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3868487

Lu Chen, Linfeng Pan, Antoine P. van Muyden, Lichen Bai, Jun Li, Yun Tong, Zhaofu Fei, A. Hagfeldt, G. Laurenczy, P. Dyson

{"title":"Embedding Single Platinum Atoms Into Nickel Nanoparticles Affords Highly Selective Catalysts for Lignin Conversion","authors":"Lu Chen, Linfeng Pan, Antoine P. van Muyden, Lichen Bai, Jun Li, Yun Tong, Zhaofu Fei, A. Hagfeldt, G. Laurenczy, P. Dyson","doi":"10.2139/ssrn.3868487","DOIUrl":"https://doi.org/10.2139/ssrn.3868487","url":null,"abstract":"Lignin is an abundant biomass source that can be converted into value-added aromatic platform chemicals. Due to the highly complex polyphenolic-structure of lignin, depolymerisation without a prior chemical treatment is challenging, and new, superior catalysts are required. Atomically dispersed catalysts containing isolated atoms are able to maximize the atomic efficiency of noble metals in a catalytic process, simultaneously providing an alternative strategy to tune the activity and selectivity by alloying with other abundant metal supports. Herein, we report a highly active and selective catalyst comprising monodispersed (single) Pt atoms on Ni nanoparticles supported on carbon (denoted as Pt1Ni/C where Pt1 represent single Pt atoms), designed for the reductive depolymerization of lignin. Selectivity towards 4-n-propylsyringol and 4-n-propylguaiacol, in which the aromatic rings are preserved, exceeds 90%. The activity and selectivity of the engineered Pt1Ni/C catalyst in the reductive depolymerization of lignin may be attributed to synergistic effects between the Ni nanoparticles that promote dissociation of H2 and supply the absorbed hydrogen to the single Pt atoms where cleavage of the C-O bonds takes place.","PeriodicalId":309999,"journal":{"name":"EngRN: Micro & Nano Technologies & Materials (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":"114792729","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