Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514299
J. Arya Lekshmi, T. Nandha Kumar, A. Haider, K. Jinesh
In this paper, filament-based resistive switching of Au/ Al2O3/FTO device stack is discussed. The proposed device exhibited a self-limited, self-rectified, asymmetric current-voltage characteristic with excellent Roff/Ron ratio >400 and rectification ratio >200. Also, the device has shown good retention(>103) property. Moreover, it has been observed that the device exhibits non-zero crossover characteristics predominantly seen in negatively formed devices, emulating the behavior of a one diode-one RRAM combination. Besides, it is reported that by modulating the input voltage sweeps, we can fine-tune the device characteristics to achieve asymmetric, analog, or digital switching properties to use in desired applications.
{"title":"Self-rectifying self-limited Resistive switching in Au/Al2O3/FTO Devices","authors":"J. Arya Lekshmi, T. Nandha Kumar, A. Haider, K. Jinesh","doi":"10.1109/NANO51122.2021.9514299","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514299","url":null,"abstract":"In this paper, filament-based resistive switching of Au/ Al2O3/FTO device stack is discussed. The proposed device exhibited a self-limited, self-rectified, asymmetric current-voltage characteristic with excellent Roff/Ron ratio >400 and rectification ratio >200. Also, the device has shown good retention(>103) property. Moreover, it has been observed that the device exhibits non-zero crossover characteristics predominantly seen in negatively formed devices, emulating the behavior of a one diode-one RRAM combination. Besides, it is reported that by modulating the input voltage sweeps, we can fine-tune the device characteristics to achieve asymmetric, analog, or digital switching properties to use in desired applications.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"65 1","pages":"17-20"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74989507","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}
A label-free detection method of the anthrax protective antigen (PA) based on surface-enhanced Raman scattering (SERS) was proposed. Au nanorods (AuNRs) substrates were prepared to realize the sensitive detection of PA. One-dimensional convolution neural network (1D-CNN) was used to process the Raman spectrum to achieve the qualitative and quantitative analysis of PA. The qualitative identification accuracy of PA under the interference of Human Serum Albumin (HSA) could reach 99.17%. In the quantitative prediction of PA concentration, the ability of CNN model (R2=0.856) was higher than that of the traditional partial least squares (PLS) method, which provides support for SERS quantitative analysis. Therefore, CNN could effectively identify and predict PA concentration with Raman spectrum, which would be helpful to expand the application of SERS technology in the field of the diagnosis of infectious disease.
{"title":"Rapid identification and quantitative analysis of anthrax protective antigen based on surface-enhanced Raman scattering and convolutional neural networks","authors":"Pengxing Sha, Peitao Dong, Jiwei Deng, Xuezhong Wu","doi":"10.1109/NANO51122.2021.9514272","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514272","url":null,"abstract":"A label-free detection method of the anthrax protective antigen (PA) based on surface-enhanced Raman scattering (SERS) was proposed. Au nanorods (AuNRs) substrates were prepared to realize the sensitive detection of PA. One-dimensional convolution neural network (1D-CNN) was used to process the Raman spectrum to achieve the qualitative and quantitative analysis of PA. The qualitative identification accuracy of PA under the interference of Human Serum Albumin (HSA) could reach 99.17%. In the quantitative prediction of PA concentration, the ability of CNN model (R2=0.856) was higher than that of the traditional partial least squares (PLS) method, which provides support for SERS quantitative analysis. Therefore, CNN could effectively identify and predict PA concentration with Raman spectrum, which would be helpful to expand the application of SERS technology in the field of the diagnosis of infectious disease.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"27 1","pages":"155-158"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74858259","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514315
Jiaqi Wang, Zhemiao Xie, E. Cheraghi, J. Liu, Siyuan Chen, Yonghai Sun, J. Yeow
Due to the excellent mechanical, electronic, and optical properties, hydrogels made from the composite play a key role in fabricating lots of devices and further applications in bioelectronics, energy storage, and even medical delivery. MXenes, as one type of advanced two-dimensional material, have been explored in wide ranges of fields. In this work, a novel fabrication method is proposed to fabricate MXene-based composite material hydrogel. We have demonstrated the excellent mechanical stretching ability of this hydrogel. By the addition of MXene, the conductivity enhancement of composite hydrogel has been realized. Furthermore, this hydrogel is promising in further micro-/nano- electronic devices like microelectrodes and supercapacitor.
{"title":"Self-Healed and Shape-Adaptive MXene Integrated Hydrogel for Wearable Electronic Applications","authors":"Jiaqi Wang, Zhemiao Xie, E. Cheraghi, J. Liu, Siyuan Chen, Yonghai Sun, J. Yeow","doi":"10.1109/NANO51122.2021.9514315","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514315","url":null,"abstract":"Due to the excellent mechanical, electronic, and optical properties, hydrogels made from the composite play a key role in fabricating lots of devices and further applications in bioelectronics, energy storage, and even medical delivery. MXenes, as one type of advanced two-dimensional material, have been explored in wide ranges of fields. In this work, a novel fabrication method is proposed to fabricate MXene-based composite material hydrogel. We have demonstrated the excellent mechanical stretching ability of this hydrogel. By the addition of MXene, the conductivity enhancement of composite hydrogel has been realized. Furthermore, this hydrogel is promising in further micro-/nano- electronic devices like microelectrodes and supercapacitor.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"15 1","pages":"310-313"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84922776","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514342
B. Petrovic, M. Gorbounov, A. Lahiri, S. Soltani
Achieving negative CO2 emissions via the combustion of sustainable biomass - known as bioenergy with carbon capture and storage - is inherently linked to the co-production of a significant amount of potentially hazardous waste combustion fly ash. Valorisation of this solid waste stream presents obvious economic, social, and environmental incentives within the context of waste utilisation and environmental protection. However, the origin of the biomass (the regional plantation) used during the combustion, dictates the physicochemical properties of this solid residue, making it suitable for specific applications while rendering it less favourable for others. In this study, a nanoporous zeolite as a CO2 adsorbent has been synthesised from industrial-grade biomass combustion fly ash generated in one of the largest biomass combustion power plants in the UK. The method of nanoporous zeolite synthesis follows a fusion-assisted hydrothermal procedure and the produced nanoporous zeolite has been characterised by X-ray diffraction. The CO2 adsorption investigations were conducted via thermogravimetric analysis to estimate the uptake capacity of the prepared adsorbents. TGA studies suggest that the nanoporous adsorbent, run under 100 mol% CO2 at atmospheric pressure, has an equilibrium capacity of over 0.8 mmolCO2/g at 50°C. The characterisation results are in good agreement with our CO2 adsorption data, demonstrating the nanoporous structure of our synthesised waste-derived zeolites.
{"title":"Biomass Combustion Fly Ash-Derived Nanoporous Zeolites for Post-Combustion Carbon Capture","authors":"B. Petrovic, M. Gorbounov, A. Lahiri, S. Soltani","doi":"10.1109/NANO51122.2021.9514342","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514342","url":null,"abstract":"Achieving negative CO2 emissions via the combustion of sustainable biomass - known as bioenergy with carbon capture and storage - is inherently linked to the co-production of a significant amount of potentially hazardous waste combustion fly ash. Valorisation of this solid waste stream presents obvious economic, social, and environmental incentives within the context of waste utilisation and environmental protection. However, the origin of the biomass (the regional plantation) used during the combustion, dictates the physicochemical properties of this solid residue, making it suitable for specific applications while rendering it less favourable for others. In this study, a nanoporous zeolite as a CO2 adsorbent has been synthesised from industrial-grade biomass combustion fly ash generated in one of the largest biomass combustion power plants in the UK. The method of nanoporous zeolite synthesis follows a fusion-assisted hydrothermal procedure and the produced nanoporous zeolite has been characterised by X-ray diffraction. The CO2 adsorption investigations were conducted via thermogravimetric analysis to estimate the uptake capacity of the prepared adsorbents. TGA studies suggest that the nanoporous adsorbent, run under 100 mol% CO2 at atmospheric pressure, has an equilibrium capacity of over 0.8 mmolCO2/g at 50°C. The characterisation results are in good agreement with our CO2 adsorption data, demonstrating the nanoporous structure of our synthesised waste-derived zeolites.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"19 1","pages":"233-236"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81729727","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514297
Chirui Han, Lue Zhang, Zhan Yang
The task of picking-up carbon nanotube (CNT) by the atomic force microscope (AFM) cantilever in the scanning electron microscope (SEM) was divided into several meta-tasks in this paper, and the motor skills of the complete task were learned from the simple meta-tasks, so as to learn the motor skills of the micro-nano robotic manipulator. Firstly, according to the motion characteristics and working environment of the manipulator, a segmentation criterion was established to divide the manipulation tasks into several different meta-tasks. Secondly, the motion trajectories of the same meta-tasks divided by multiple demonstration was filtered by moving average filter, and procrustes dynamic time warping (pDTW) was used for timing alignment. Then, Gaussian mixture model (GMM) was used to characterize the motion characteristics of the meta-tasks, and the optimal motion trajectories of the meta-tasks were generated by Gaussian mixture regression (GMR). Finally, according to the optimal meta-task trajectories, Dynamic Movement Primitive (DMP) was used to learn the motor skills of meta-tasks, and the meta-tasks library was recorded and created. We learned the motor skills of micro-nano robotic manipulator working in micro-nano environment, which laid a foundation for autonomous movement to complete tasks in the future.
本文将扫描电子显微镜(SEM)中原子力显微镜(AFM)悬臂拾取碳纳米管(CNT)的任务划分为多个元任务，并从简单的元任务中学习完成任务的运动技能，从而学习微纳机器人机械手的运动技能。首先，根据机械臂的运动特点和工作环境，建立分割准则，将操作任务划分为多个不同的元任务;其次，采用移动平均滤波对同一元任务的运动轨迹进行滤波，并采用procrustes动态时间规整(pDTW)进行时序对齐;然后，利用高斯混合模型(GMM)对元任务的运动特征进行表征，利用高斯混合回归(GMR)生成元任务的最优运动轨迹;最后，根据优选的元任务轨迹，利用动态运动原语(Dynamic Movement Primitive, DMP)学习元任务的运动技能，并记录和创建元任务库。我们学习了在微纳环境中工作的微纳机器人机械手的运动技能，为今后自主运动完成任务奠定了基础。
{"title":"Motor Skills Learning for CNT Pick-up of Micro-Nano Robotic Manipulator in SEM","authors":"Chirui Han, Lue Zhang, Zhan Yang","doi":"10.1109/NANO51122.2021.9514297","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514297","url":null,"abstract":"The task of picking-up carbon nanotube (CNT) by the atomic force microscope (AFM) cantilever in the scanning electron microscope (SEM) was divided into several meta-tasks in this paper, and the motor skills of the complete task were learned from the simple meta-tasks, so as to learn the motor skills of the micro-nano robotic manipulator. Firstly, according to the motion characteristics and working environment of the manipulator, a segmentation criterion was established to divide the manipulation tasks into several different meta-tasks. Secondly, the motion trajectories of the same meta-tasks divided by multiple demonstration was filtered by moving average filter, and procrustes dynamic time warping (pDTW) was used for timing alignment. Then, Gaussian mixture model (GMM) was used to characterize the motion characteristics of the meta-tasks, and the optimal motion trajectories of the meta-tasks were generated by Gaussian mixture regression (GMR). Finally, according to the optimal meta-task trajectories, Dynamic Movement Primitive (DMP) was used to learn the motor skills of meta-tasks, and the meta-tasks library was recorded and created. We learned the motor skills of micro-nano robotic manipulator working in micro-nano environment, which laid a foundation for autonomous movement to complete tasks in the future.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"368 1","pages":"217-220"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80396720","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514285
Gaurab Panda, Ryan S. Aridi, Haozhi Dong, V. Ayres, H. Shaw
Vertical spin-orbit coupling to produce quantum entanglement between electrons confined in quantum dots is investigated for a split-gate double layer heterostructure design. The quantum dots in each active layer may result from quantum point contact fabrication or be generated dynamically using a surface acoustic wave flying qubit approach. Optimization of spin-spin coupling versus all other couplings can set up competing requirements for heterostructure and device fabrication choices. In the present work, a series of active layers: indium antimonide, indium arsenide, indium gallium arsenide, and gallium arsenide, and device architectures is investigated. We find that device architectures that support spin entanglement are within achievable fabrication ranges for the active layer materials investigated.
{"title":"Coupled Spin-Orbit Interactions in Flying Qubit Architectures","authors":"Gaurab Panda, Ryan S. Aridi, Haozhi Dong, V. Ayres, H. Shaw","doi":"10.1109/NANO51122.2021.9514285","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514285","url":null,"abstract":"Vertical spin-orbit coupling to produce quantum entanglement between electrons confined in quantum dots is investigated for a split-gate double layer heterostructure design. The quantum dots in each active layer may result from quantum point contact fabrication or be generated dynamically using a surface acoustic wave flying qubit approach. Optimization of spin-spin coupling versus all other couplings can set up competing requirements for heterostructure and device fabrication choices. In the present work, a series of active layers: indium antimonide, indium arsenide, indium gallium arsenide, and gallium arsenide, and device architectures is investigated. We find that device architectures that support spin entanglement are within achievable fabrication ranges for the active layer materials investigated.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"28 1","pages":"409-412"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89559342","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514282
Dominic Bosomtwi, M. Osiński, Viktoriia E. Babicheva
We design and analyze the optical properties of multilayered metal-dielectric fishnet metastructures using fullwave numerical simulations. We report negative refraction at the infrared spectral range with low loss. Most previous studies reported negative refraction in this range using stack fishnet design with either gold or silver metal. Our metastructure is made up of copper/SiO2/copper stack fishnet, which is CMOS-compatible and features losses comparable to those in metastructures utilizing noble metals.
{"title":"Towards CMOS-Compatible Negative-Index Metastructures","authors":"Dominic Bosomtwi, M. Osiński, Viktoriia E. Babicheva","doi":"10.1109/NANO51122.2021.9514282","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514282","url":null,"abstract":"We design and analyze the optical properties of multilayered metal-dielectric fishnet metastructures using fullwave numerical simulations. We report negative refraction at the infrared spectral range with low loss. Most previous studies reported negative refraction in this range using stack fishnet design with either gold or silver metal. Our metastructure is made up of copper/SiO2/copper stack fishnet, which is CMOS-compatible and features losses comparable to those in metastructures utilizing noble metals.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"49 1","pages":"425-428"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86647569","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514351
D. Chryssikos, J. Dlugosch, Jerry A Fereiro, T. Kamiyama, M. Sheves, D. Cahen, M. Tornow
Understanding the charge transport properties of proteins at the molecular scale is crucial for the development of novel bioelectronic devices. In this contribution, we report on the preparation and electrical characterization of thin films of bacteriorhodopsin grafted on the surface of titanium nitride via aminophosphonate linkers. Thickness analysis using atomic force microscopy revealed a protein film thickness of 8.2±1.5 nm, indicating the formation of a protein bilayer. Electrical measurements were carried out in the dry state, in a vertical arrangement with a eutectic gallium-indium (EGaIn) or an evaporated Ti/Au top contact. DC current-voltage measurements yielded comparable effective tunneling decay constants $betasim 0.13mathrm{A}^{-1}$ for the EGaIn top contact and $sim 0.15mathrm{A}^{-1}$ for the Ti/Au top contact. The results presented herein may establish a novel platform for studying charge transport via protein molecules in a solid-state device configuration.
{"title":"Electronic Transport Through Organophosphonate-Grafted Bacteriorhodopsin Films on Titanium Nitride","authors":"D. Chryssikos, J. Dlugosch, Jerry A Fereiro, T. Kamiyama, M. Sheves, D. Cahen, M. Tornow","doi":"10.1109/NANO51122.2021.9514351","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514351","url":null,"abstract":"Understanding the charge transport properties of proteins at the molecular scale is crucial for the development of novel bioelectronic devices. In this contribution, we report on the preparation and electrical characterization of thin films of bacteriorhodopsin grafted on the surface of titanium nitride via aminophosphonate linkers. Thickness analysis using atomic force microscopy revealed a protein film thickness of 8.2±1.5 nm, indicating the formation of a protein bilayer. Electrical measurements were carried out in the dry state, in a vertical arrangement with a eutectic gallium-indium (EGaIn) or an evaporated Ti/Au top contact. DC current-voltage measurements yielded comparable effective tunneling decay constants $betasim 0.13mathrm{A}^{-1}$ for the EGaIn top contact and $sim 0.15mathrm{A}^{-1}$ for the Ti/Au top contact. The results presented herein may establish a novel platform for studying charge transport via protein molecules in a solid-state device configuration.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"35 1","pages":"389-392"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76924896","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514321
Paramjot Singh, P. A. Sohi, M. Kahrizi
In this study, we probe the surface engineered (vacancy and Stone Wales defective) hydrogen passivated armchair graphene nanoribbon with a width of 7 atoms as a biosensing material to detect methanethiol biomarkers. Induction of defects results in the decrement of the bandgap by the formation of the trapping states. After geometry optimisation, it is found that only vacancy induced armchair graphene nanoribbon can form strong binding with the biomarker, whereas Stone Wales defect induced armchair graphene nanoribbon show disassociation with the biomarker by having positive adsorption energy. Using density functional theory, the electronic properties of a vacancy-induced armchair graphene nanoribbon with and without adsorption of methanethiol are calculated, showing that methanethiol adsorption leads to increment in the bandgap of the host material by eliminating the trapping states. The work function and electron affinity change after adsorption. As there are significant changes in the electronic properties, vacancy induced armchair graphene nanoribbon show high sensing capabilities toward methanethiol biomarkers.
{"title":"Effect of point defects in armchair graphene nanoribbons for biosensing of Methanethiol biomarkers: A DFT Study","authors":"Paramjot Singh, P. A. Sohi, M. Kahrizi","doi":"10.1109/NANO51122.2021.9514321","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514321","url":null,"abstract":"In this study, we probe the surface engineered (vacancy and Stone Wales defective) hydrogen passivated armchair graphene nanoribbon with a width of 7 atoms as a biosensing material to detect methanethiol biomarkers. Induction of defects results in the decrement of the bandgap by the formation of the trapping states. After geometry optimisation, it is found that only vacancy induced armchair graphene nanoribbon can form strong binding with the biomarker, whereas Stone Wales defect induced armchair graphene nanoribbon show disassociation with the biomarker by having positive adsorption energy. Using density functional theory, the electronic properties of a vacancy-induced armchair graphene nanoribbon with and without adsorption of methanethiol are calculated, showing that methanethiol adsorption leads to increment in the bandgap of the host material by eliminating the trapping states. The work function and electron affinity change after adsorption. As there are significant changes in the electronic properties, vacancy induced armchair graphene nanoribbon show high sensing capabilities toward methanethiol biomarkers.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"56 1","pages":"142-145"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86219883","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}
Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514320
P. Moeck
A geometric form of information theory allows for reasonable, i.e. probabilistic, evidence-ranking based, and generalized noise-level dependent, classifications of the crystallographic and quasicrystallographic symmetries in noisy digital images. Such classifications are based solely on the image pixel intensity values, justifiable assumptions about the aggregate distribution of generalized noise in the images, asymptotic extrapolations to zero-noise images, and rational symmetry model selections with maximized predictive accuracy in the presence of both symmetry-inclusion relations and pseudo-symmetries. Preferring a well developed geometric form of information theory over a theoretically possible geometric-Bayesian approach for these classifications is the only subjective choice made. Using digital data planes and assuming approximately Gaussian distributed generalized noise, reasonable crystallographic and quasicrystallographic symmetry classifications can be made for noisy images from both scanning probe and transmission electron microscopes. A binary type classification of structurally very similar materials into either a quasicrystal or one of its rational/crystalline approximants based on the approximate point symmetries in their noisy digital images is proposed here for the first time.
{"title":"Towards more reasonable identifications of the symmetries in noisy digital images from periodic and aperiodic crystals","authors":"P. Moeck","doi":"10.1109/NANO51122.2021.9514320","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514320","url":null,"abstract":"A geometric form of information theory allows for reasonable, i.e. probabilistic, evidence-ranking based, and generalized noise-level dependent, classifications of the crystallographic and quasicrystallographic symmetries in noisy digital images. Such classifications are based solely on the image pixel intensity values, justifiable assumptions about the aggregate distribution of generalized noise in the images, asymptotic extrapolations to zero-noise images, and rational symmetry model selections with maximized predictive accuracy in the presence of both symmetry-inclusion relations and pseudo-symmetries. Preferring a well developed geometric form of information theory over a theoretically possible geometric-Bayesian approach for these classifications is the only subjective choice made. Using digital data planes and assuming approximately Gaussian distributed generalized noise, reasonable crystallographic and quasicrystallographic symmetry classifications can be made for noisy images from both scanning probe and transmission electron microscopes. A binary type classification of structurally very similar materials into either a quasicrystal or one of its rational/crystalline approximants based on the approximate point symmetries in their noisy digital images is proposed here for the first time.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"52 2 1","pages":"68-71"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77627594","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}
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