2021 IEEE 21st International Conference on Nanotechnology (NANO)最新文献

{"title":"Electron Transport in Trans-polyacetylene with Heterogeneous Electrodes: A DFT Study","authors":"K. Gaurav, A. Srivastava","doi":"10.1109/NANO51122.2021.9514309","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514309","url":null,"abstract":"The conducting polymers are the highly studied class of functional materials for their applications in the various technological field. Trans-polyacetylene is a conducting polymer having n repetitive units of $(-mathrm{C}=mathrm{C}-)_{n}$, indicating inherent conjugation in nature. In the present work, a two-probe model of pristine and defects (hybridization and torsion) induced trans-polyacetylene with the semi-infinite zigzag graphene nanoribbon (ZGNR) electrodes have been modeled and employed to analyze the transport properties, within the framework of Density Functional Theory (DFT) and Non-Equilibrium Green's Function (NEGF) formalisms. We report that the incorporation of hybridization and torsion defects decreases the drive current. Moreover, the hybridization defect has caused about 75 times reduction in the drive current at 2V, whereas both hybridization and torsion defects shows a reduction by about 21 times with respect to the pristine model. The computed transmission spectrum, transmission pathways, and molecular projected self-consistent Hamiltonian (MPSH) eigenstates, very well comprehend the degradation of drive current in the altered models.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"46 1","pages":"185-188"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88318874","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}

{"title":"2D transition metal dichalcogenides nanosheets as gate modulated cold electron emitters","authors":"F. Giubileo, E. Faella, A. Pelella, A. Grillo, M. Passacantando, A. Di Bartolomeo","doi":"10.1109/NANO51122.2021.9514271","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514271","url":null,"abstract":"We report a detailed investigation of the field emission properties of transition metal dichalcogenides, namely MoS2 and WSe2, taking advantage of an experimental setup realized inside a scanning electron microscope equipped with nano-manipulated probe-tips, used for positioning a tip-shaped anode at a nanometric distance from the emitting surface. For n-type WSe2 monolayer on Si/SiO2 substrate, we show that electrons can be extracted also from the flat part of the flake with a current intensity up to few nanoamperes. More interestingly, we demonstrate that the field emission current can be modulated by the back-gate voltage that controls the n-type doping of the WSe2 monolayer. Similarly, we demonstrate that monolayer MoS2 flakes are suitable for gate-controlled field emission devices, opening the way to the development of new field emission transistors based on ultrathin materials.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"46 1","pages":"189-192"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82773935","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}

{"title":"Synthesis and experimental investigation of zinc oxide and praseodymium oxide fused metal oxide nanostructures","authors":"Parvathy Bhaskar, M. Veena, B. S. Madhukar","doi":"10.1109/NANO51122.2021.9514345","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514345","url":null,"abstract":"This paper encapsulates the synthesis of zinc oxide (ZnO) nanoparticles with different weight percentages of praseodymium oxide (PrO2), by low-cost environmentally friendly solution combustion synthesis (SCS) method. In this procedure metal nitrates are used as oxidizer with glycine as fuel for the synthesis of nanoparticles. This procedure involves propagation of self-sustained exothermic reactions in aqueous or sol-gel media. The structural, morphological and optical properties of the prepared nanoparticles are examined by powder X-ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HRTEM) and ultra violet visible near infra-red (UV - Vis NIR) spectroscopy. The XRD patterns of the samples confirm that the average crystalline size of the praseodymium added ZnO samples decreases from 37.32 nm to 18.776 nm, when the praseodymium content increases from 5 to 20% by weight. The HRTEM and Selected Area Electron Diffraction (SAED) data clearly show the morphology and structure of the samples. Furthermore, the UV - vis spectra validate the presence of praseodymium content in the ZnO samples.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"81 1","pages":"104-107"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76272892","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}

{"title":"Exploring the Holliday Junction in a DNA nanostructure for creating excitonic dimers","authors":"Divita Mathur, Young C. Kim, S. A. Díaz, Gregory A Ellis, P. Cunningham, S. B. Rolczynski, M. Ancona, Igor L. Medintz, J. Melinger","doi":"10.1109/NANO51122.2021.9514330","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514330","url":null,"abstract":"DNA nanostructures can perform as scaffolds to organize dye molecules into networks for a variety of applications. Such networks rely on having efficient energy-and/or electron-transport processes, and these in turn depend sensitively on the relative distance and orientation of the dye molecules. In using DNA as a scaffold, a crucial question is - to what extent can it control the dye position and orientation? The ability of DNA nanostructures to dictate the position is reasonably well addressed in the literature, but much less is known about the potential for controlling the orientation and its dependences on the local microenvironment of the DNA and on the dye attachment chemistry. Furthermore, can sites within a DNA nanostructure be used to place dyes in close proximity to create strong excitonic coupling, which, ultimately, could be useful in creating networks that use coherent energy transfer? To investigate these issues, we employ a Cy3 probe dye dimer and use both fluorescence measurements and numerical simulations to determine the degree to which a 30-helix DNA origami bundle can provide the desired excitonic coupling. Overall, the results of this work should be useful for creating DNA-scaffolded dye networks that use strong dye coupling.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"43 1","pages":"360-363"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78106630","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}

{"title":"Undoped and Fe-doped core/shell ZnS@ZnO heterostructure for photocatalytic water splitting hydrogen evolution","authors":"S. Didarataee, A. Khodadadi, M. Mortazavi, F. Mousavi","doi":"10.1109/NANO51122.2021.9514347","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514347","url":null,"abstract":"This paper reports undoped and Fe-doped ZnS/ZnO heterostructure for photocatalytic water splitting to evolve hydrogen. Zn(1-x)FexS nanorods were first prepared by a hydrothermal method and then partially oxidized in air to incorporate ZnO in the structure. The heterostructures were characterized by XRD, BET surface area measurement, FESEM-EDS, UV-DRS, and temperature programmed oxidation (TPO). When 34wt% ZnO is incorporated into the heterostructure its bandgap decreases by 0.34 eV. It is demonstrated that by doping 3mol% Fe into the heterostructure, the hydrogen evolution increases by 41%.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"30 1","pages":"352-355"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87170036","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}

{"title":"Ginsenoside Rg1 Nanophytosome synthesis and their characterization: An initiative towards the treatment of Amyotrophic Lateral Sclerosis","authors":"N. Merchant, T. Kavya, Rachana Srinivasa, P. Rao, P. Narayanan, Savithri Bhat","doi":"10.1109/NANO51122.2021.9514358","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514358","url":null,"abstract":"Amyotrophic lateral sclerosis is a devastating neurodegenerative disease that affects the brain and spinal cord of healthy adults. The disease progresses rapidly and is fatal, leaving patients paralyzed and unable to breathe. The cause of the disease and its progression remains poorly understood. Currently, there are no known cure or effective treatment available for ALS. But with the advances in medicine and technology, there has been a huge rise in data produced. The present study is focused on synthesis and characterization of Nanophytosomes (NP) to improve the bioavailability and efficacy of Ginsenoside Rg1 compound. The nanoparticles were visualized by SEM and analyzed by Fourier Transform Infrared Spectroscopy for the type of interactions holding the components together in the NP. The size of the NP was in the range of 180 to 195nm. A comparative antimicrobial assay against strains of E.coli for NP and Ginsenoside Rg1 showed positive results for NP with increasing CFUs of E.coli while Ginsenoside Rg1 showed results only at lower CFUs of the Bacteria. Dispersion studies suggested that the NP had a maximum release rate of the drug at about 4 hours. This suggests the stability and sustained release property of the NP as compared to Ginsenoside Rgl which acts immediately on the target. Antioxidant's property of the NP was compared with Ginsenoside Rg1 by testing scavenging potential through assays such as SOD, NO and DPPH. The antioxidant activity was concentration dependent and the anti-oxidative properties of NP was found in the close range with that of Ginsenoside Rg1 compound. NP could possess antioxidative properties which could last longer than the compound alone when compared. The current technology thus could be a boon to the treatment of chronic diseases like ALS, Parkinson's Disease, AD as it improves the bioavailability and efficacy of the drug it encapsulates.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"153 1","pages":"319-322"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86451292","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}

{"title":"Fabrication and simulations of high-aspect-ratio nanopores for polymer-based resistive pulse sensors","authors":"J. Berkenbrock, G. Wells, M. Mail, T. Scherer, S. Achenbach","doi":"10.1109/nano51122.2021.9514281","DOIUrl":"https://doi.org/10.1109/nano51122.2021.9514281","url":null,"abstract":"Microfluidic devices are a class of Micro Electromechanical Systems (MEMS) intended for fluids manipulation, mostly liquids, in the order of microliters and below. The global market of micro and nanofluidic devices has experienced continuous growth over the past few years [1]. In 2020, this market was valued at over USD 4.6 billion in conservative terms, and it is predicted to keep a growth rate of somewhat between 13 and 23% in the next half-decade [2]–[3]. Microdevices are characterized by having at least one dimension in the micrometre range, as well as nanodevices, have it in the nanometer scale. The main applications to micro and nanofluidic devices are drug delivery, pharmaceutical and biotechnology research, clinical and point-of-care (POC) diagnostics [2]. Companies working in this field experienced a surge in demand with the rise of the COVID-19 pandemic. For the rapid testing against SARS-CoV-2, testing devices became necessary for screening populations afar from testing centers and health care facilities [4]–[5]. The development of micro-and nano detectors for new viruses is challenging even with all the background acquired from working with other viruses [6]–[7]. One long-standing detection approach was established in 1953 by W. Coulter for counting cells, a method which is known as Resistive Pulse Sensor (RPS) or Coulter counter [8]. In short, an RPS refers to two chambers filled with electrolyte solution and connected by a single orifice. The target delivered in one chamber shall flow through the orifice to the other chamber led by electrochemical forces. The translocation of the targets causes partial and non-permanent obstruction of the orifice. By monitoring the electric current during this assay, it induces the formation of a pulse-like shape representing a pulse of resistance. In the following decades, this method was adapted to the submicrometric scale with advances in micro-and nanofabrication techniques [9]–[10]. The fabrication of such micro detectors is often based on photolithography, but some emergent and alternative techniques are becoming more common [6, 11–12]. Focused ion beam (FIB) is one of these unconventional approaches that allow for patterning high aspect ratio structures into a mixture of materials [13]–[14]. A challenge to pattern composite materials (e.g., sandwich-like membranes), which might be based on polymers and metals, raises from the different physical properties of materials [15]. The sensitivity and applicability of RPS are directly dependant on the shape and quality of the final structure. For instance, wall smoothness is one of the parameters that should be considered when choosing a fabrication approach. In this work, we will present an advanced nanofabrication design based on focused ion beam technology to drill a nanopore into a polymer-metal-polymer membrane. The intricate structure to be presented in this work was chosen to avoid fabrication artifacts described previously [16]. Numerical sim","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85775856","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}