2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)最新文献

{"title":"A Novel Pulse Heating Approach for Gas Sensors with Concentration Estimation through Back Propagation Neural Network","authors":"Ye Tian, Gaoqiang Niu, Yushen Hu, Fei Wang","doi":"10.1109/NEMS50311.2020.9265567","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265567","url":null,"abstract":"This work aims to heat gas sensors with a novel approach by applying pulse heating instead of conventional DC voltage heating. Since the change in the resistance of the sensor is inapparent, a specific program is adopted to process the origin data, which extracts both rising and dropping edges of the data plot and transforms them into a bitmap. The origin data are plotted into resistance-time figure, and an algorithm is applied to extract the rising edges of each pulse. Then the edges are transformed into a pixel line and further processed. The algorithm for analysis of data and estimation of concentration is realized by utilizing multilayer back propagation neural network (BPNN) and deep learning. Practical tests are conducted on two commercial ethanol sensors MP-3B, with one of them heated by pulse and the other by stable voltage, as calibrated sensor. Currently, a relative error of 10% is achieved when the concentration varies from 0 ppm to 200 ppm. This research shows the potential of applying pulse heating approach for gas sensor testing and quantitively analyzing the concentrations of single VOC gas by BPNN.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"177 1 1","pages":"549-553"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91545907","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":"Wearable Sensors for On-Leaf Monitoring of Volatile Organic Compounds Emissions from Plants","authors":"Satyanarayana Moru, H. Ibrahim, Liang Dong","doi":"10.1109/NEMS50311.2020.9265575","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265575","url":null,"abstract":"A wearable electrochemical sensor was developed for on-leaf detection of volatile organic compounds (VOCs) emissions from plants. The sensor was made of all flexible materials that allow conformable attachment to the leaf. Selective detection of methanol, one of the major VOC emissions by maize plant, was realized via a unique recognition interface formed between the conducting polymer microcrystallites and platinum nanoparticles (Pt-polymer). The Pt-polymer interface was formed using a simple green electrochemical polymerization process. In a field condition, we demonstrated monitoring of VOCs using the wearable sensor technology. The presented sensor exhibited a high selectivity to gaseous methanol, a low sub-ppm limit of detection, and a high tolerance to temperature and humidity variations in the crop field.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"170 ","pages":"565-570"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91462319","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":"Thermal Conductivities and Interfacial Thermal Conductance of 2D WSe2","authors":"Yingtao Wang, Yuan Gao, E. Easy, E. Yang, Baoxing Xu, Xian Zhang","doi":"10.1109/NEMS50311.2020.9265628","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265628","url":null,"abstract":"Atomically thin materials like graphene and semiconducting transition metal dichalcogenides (TMDCs) have drawn broad interest in recent years, provoking investigation into multiple properties. In this work, we used the Raman optothermal technique to measure the thermal transport properties of a popular TMDC material WSe2, in the single-atomic layer (1L) form in both suspended and supported form. We implemented more direct measurements of the 1L WSe2 under study, and discovered WSe2’s absorption coefficient from the measurements. In addition, by comparing the response of 1L WSe2 using several kinds of laser spot sizes, we are able to obtain the lateral thermal conductivity of 1L WSe2 and the interfacial thermal conductance to the substrate. For 1L WSe2, the room-temperature thermal conductivity is 36 ± 12 W/(m•K) in supported form and 43 ± 13 W/(m•K) in suspended form. Significantly, the interfacial thermal conductance of 1L WSe2 is determined to be 2.89 ± 0.45 W/(m2•K), a parameter important for thermal management design and modeling of electronic devices.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"2 1","pages":"575-579"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89309131","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":"Interfacial adhesion behavior between conductive polymers and functionalized graphene via molecular dynamic simulation","authors":"Bin Hu, Kedong Bi","doi":"10.1109/NEMS50311.2020.9265620","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265620","url":null,"abstract":"The interaction mechanism between typical conductive polymers and chemically functionalized graphene layers was investigated via molecular dynamics (MD) simulation. The designed adjoining systems consist of typical conductive polymers, such as polythiophene (PTh), polypyrrole (PPy) and functionalized graphene. Various functional groups including amine (NH2), carboxyl (COOH), hydroxyl (OH), and methyl (CH3) were distributed uniformly throughout the intrinsic graphene upper surface to achieve graphene functionalized structures. The simulation calculation results show that the interfacial interaction energy between the conductive polymers and the graphene oxide was more than that between the conductive polymer and the intrinsic graphene. Moreover, the electronegativity of functional groups and surface roughness of functionalized graphene play predominant roles in the interaction energy between the conductive polymers and the functionalized modified graphene layer, which functional groups with greater chemical electronegativity led to further enhancement in interfacial adhesion behavior. The interface interaction energy was decreased as the surface numerical density of functional group, except for the graphene oxided with the non-polar methyl groups. In addition, the highest interfacial interaction energy was observed at the interfacial region of PPy and carboxylated functionalized graphene as a result of forming hydrogen bonding interaction. The density profiles were studied to characterize interfacial properties of polymers due to the active and powerful interfacial adhesion behavior between modified graphene and conductive polymers. The results can be applied to develop and manufacture more high performance reinforced nanocomposites for next generation microelectronic packaging and solar cell applications.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"02 1","pages":"559-564"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89736234","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":"Nanorobot for Cancer Biomarker Instrumentation","authors":"A. Cavalcanti, D. Murphy, P. Dasgupta","doi":"10.1109/NEMS50311.2020.9265632","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265632","url":null,"abstract":"The fast development in fields such as nanoelectronics, proteomics, and diagnosis, are paving the way towards the growing interest from the international scientific community towards the development of nanomachines. Developing tiny devices, with integrated nanoscale components, is expected to provide unprecedented possibilities for medical treatments, including cancer. This work presents the use of clinical data based on Myc protein overexpression as a foraging approach to guide nanorobots to detect cancer in the early stages of development.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"92 1","pages":"431-436"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80501993","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":"Intracellular Delivery using Anisotropic Gold Nanocrystals Synthesized by Microfluidic Device","authors":"Kavitha Illath, A. K. Narasimhan, Pallavi Shinde, S. Wankhar, M. Nagai, T. Santra","doi":"10.1109/NEMS50311.2020.9265617","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265617","url":null,"abstract":"This work presents the synthesis of anisotropic gold nanocrystals (Au NCs) using a segmented flow-based microfluidic device, and intracellular delivery using the synthesized particles. The device consists of T and Y shape junctions, cross channel, and winding geometries, where reagents mix. Reagents meet at the initial Y-junction and the T-shape junction generates droplets. Synthesized Au NCs are characterized and are found to possess multiple plasmonic peaks as per their size, shape and anisotropic nature. These plasmonic peaks can be tuned to the near-infrared region, which is advantageous in different biomedical applications. With the synthesized Au NCs as a mediator, propidium iodide dye is successfully delivered into the cellular cytoplasm of HeLa cells by using nanosecond pulse laser. The results demonstrated that Au NCs synthesized using a segmented flow-based microfluidic device can be used for the intracellular delivery of different exogenous molecules. The best results are achieved as 96% delivery efficiency and 98% cell viability. Thus, our platform potentially applicable to anisotropic Au NCs synthesis as well as cellular therapy and diagnostic purpose.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"65 1","pages":"448-452"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74728787","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":"A Fully Transparent, Flexible μECoG Array Based on Highly Conductive and Anti-reflective PEDOT:PSS-ITO-Ag-ITO Thin Films","authors":"Weiyang Yang, Q. Fan, Wen Li","doi":"10.1109/NEMS50311.2020.9265573","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265573","url":null,"abstract":"Integrative neural interfaces combine neurophysiology and optogenetics with neural imaging, providing numerous opportunities for neuroscientists to study the structure, function, and diseases in neural circuits. Such a comprehensive interface demands miniature electrode arrays that are highly transparent, mechanically flexible, and biocompatible. Compared to implanted electrodes, microscale electrocorticogram (μECoG) arrays are less invasive, therefore lowering the risk of infection, seizure, and stroke. Common transparent μECoG arrays are made of a single material and at most two materials, including indium tin oxide (ITO), ultrathin metals, graphene, poly-(3, 4-ethylenedioxythiophene)/ poly(styrenesulfonate) (PEDOT:PSS), etc. , making it hard to possess the excellent combination of properties, like high transmittance, low electrical resistance, mechanical flexibility, stability, and biocompatibility. In this paper, we structured an ultra-flexible, fully transparent, highly conductive, and peak-transmittance-tunable μECoG array with a PEDOT:PSS-ITO-Ag-ITO multilayer assembly on a thin Parylene C substrate. Each array consisted of 32 transparent microelectrodes distributed uniformly and divided equally into two 5 mm× 11 mm panels. The transmittance of the PEDOT:PSS-ITO-Ag-ITO assembly under the 550 nm targeted wavelength on the Parylene C substrate was ~7% higher than that of a single ITO layer of the equivalent thickness. The average impedance of the microelectrodes at 1 kHz was ~45 kΩ and increased to ~59 kΩ after four weeks of soaking test, suggesting the stability of the electrodes for long-term electrophysiology recording. Cyclic voltammetry was performed to confirm the increased charge storage capacity. These microelectrodes based on PEDOT:PSS-ITO-Ag-ITO also showed a neglectable signal-to-noise ratio (SNR) changes under blue, green, yellow and red light-emitting diodes (LEDs) compared with no light. In vivo recording from the primary visual cortex (V1) of an anesthetized rat validated the efficacy of the transparent electrodes for recording ECoG activity in living brain tissues.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"38 1","pages":"124-129"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74862748","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":"Modeling of Plasmonic Organic Solar Cells using Core-Shell Metallic Nanoparticles","authors":"Muath Bani-Salim, R. Nekovei, A. Verma","doi":"10.1109/NEMS50311.2020.9265610","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265610","url":null,"abstract":"This work investigates the contribution of different shell coating materials for silver nanoparticles (AgNPs) plasmonic on the overall performance of organic solar cells (OSC). Additionally, this work evaluates the optimum shell thickness for power conversion efficiency (PCE). The results show that the use of bare AgNPs increases the PCE of PTB7:PC70BM active layer from 7.6% to 7.79%. The PCE has a significant increase with the use of shell coating materials, and it reaches 8.1% and 8.03% for Silicon oxide (SiO2) and Titanium dioxide (TiO2), respectively. Also, this work suggests the use of Lithium Fluoride (LiF) and Magnesium Fluoride (MgF2) as coating material for AgNPs. The PCE reaches 8.15% and 8.13% for these two materials, respectively. Moreover, the results show that the optimum coating thickness is around 4 nm for most of the coating materials.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"47 1","pages":"422-425"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74325019","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":"Towards High-Throughput Single-Cell Proteomics Using Droplet Microfluidics","authors":"Mohsen Paryavi, Richie Chio, M. A. Rahman, I. MacPherson, A. Ohta","doi":"10.1109/NEMS50311.2020.9419479","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9419479","url":null,"abstract":"Single-cell proteomics is emerging as an effective method to characterize cell populations. To accommodate alternative protein labeling and quantification technologies, it may be beneficial to incorporate cell encapsulation and droplet coalescence in a standard workflow. In this work, a microfluidic device was designed and tested towards the goal of high-throughput single-cell analysis. The device incorporated a cell-encapsulated droplet generator, an on-chip DNA-barcode droplet separator, and a droplet merging module. The microfluidic droplets that can contain cells are merged with the barcode-containing droplets. A merging efficiency of 68% was achieved.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"15 1","pages":"329-332"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81987045","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":"Underground Water Flow Speed and Direction Measurement Using Differential Pressure Sensors","authors":"Yukito Fukushima, M. Taie, T. Kageyama, Takahiro Tani, Y. Kajikawa, M. Kuroiwa, T. Seiyama, Sang-Seok Lee","doi":"10.1109/NEMS50311.2020.9265574","DOIUrl":"https://doi.org/10.1109/NEMS50311.2020.9265574","url":null,"abstract":"To measure water flow, currently many sensors have been proposed using ultrasonic or electromagnetic induction method. However, those sensors are not suitable for wireless sensor network systems to measure and monitor water flow remotely due to high power consumption. Therefore, a small sized and low power consuming sensor is necessary to monitor water flow using a wireless sensor network system. In this paper, we propose a new sensor system for underground water flow monitoring using differential pressure sensors. The sensor system consisted of four differential pressure sensors measuring pressure differences, which are converted into flow speed and flow direction. We designed, fabricated and evaluated the sensor system. As a result, we confirmed that the sensor system successfully measured water flow speed when the speed was faster than 400 mm/sec. Moreover, in case of water flow direction, the sensor system could successfully detect it when water flow speed was faster than 882 mm/sec. Although there was water speed limitation for sensing caused from pressure sensor specification, we could validate the proposed sensor system.","PeriodicalId":6787,"journal":{"name":"2020 IEEE 15th International Conference on Nano/Micro Engineered and Molecular System (NEMS)","volume":"18 1","pages":"14-17"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82095036","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}