Pub Date : 2013-08-01DOI: 10.1109/NANO.2013.6721032
Chengzhi Hu, M. Nakajima, Huaping Wang, Tao Yue, Yajing Shen, Masaru Takeuchi, Qiang Huang, M. Seki, T. Fukuda
Alginate hydrogel finds widespread applications in tissue engineering, cancer therapy, wound management and drug/cell/growth factor delivery due to its biocompatibility, hydrated environment and desirable viscoelastic properties. However Lack of controllability is still an obstacle for utilizing it in the fabrication of 3D tissue constructs and accurate targeting in mass delivery. Here, we proposed a new method for achieving magnetic alginate hydrogel microfiber by encapsulating magnetic nanoparticles inside alginate solution and solidifying the magnetic alginate into hydrogel fiber inside microfluidic chips and micro syringe system. The fabrication method for 3 layered microfluidic channel was given. In the experiments, the magnetic nanoparticles and alginate solution present to be a uniform suspension, no aggregation of magnetic nanoparticles was found, which is crucial for flow control inside microfluidic chips. By regulating the flow rate of different solutions inside the chip, magnetic hydrogel fiber and pure hydrogel fiber are achieved with controllable diameters. Patterning device and magnetic pillar were employed as a magnetic guidance to pattern and align the magnetic fibers. The proposed method for fabricating magnetic hydrogel fiber holds great potentials to engineer 3D tissue constructs with complex architectures and hierarchical vascular networks to mimic the native tissue microenvironment.
{"title":"Magnetic manipulation for spatially patternel alginate hydrogel microfibers","authors":"Chengzhi Hu, M. Nakajima, Huaping Wang, Tao Yue, Yajing Shen, Masaru Takeuchi, Qiang Huang, M. Seki, T. Fukuda","doi":"10.1109/NANO.2013.6721032","DOIUrl":"https://doi.org/10.1109/NANO.2013.6721032","url":null,"abstract":"Alginate hydrogel finds widespread applications in tissue engineering, cancer therapy, wound management and drug/cell/growth factor delivery due to its biocompatibility, hydrated environment and desirable viscoelastic properties. However Lack of controllability is still an obstacle for utilizing it in the fabrication of 3D tissue constructs and accurate targeting in mass delivery. Here, we proposed a new method for achieving magnetic alginate hydrogel microfiber by encapsulating magnetic nanoparticles inside alginate solution and solidifying the magnetic alginate into hydrogel fiber inside microfluidic chips and micro syringe system. The fabrication method for 3 layered microfluidic channel was given. In the experiments, the magnetic nanoparticles and alginate solution present to be a uniform suspension, no aggregation of magnetic nanoparticles was found, which is crucial for flow control inside microfluidic chips. By regulating the flow rate of different solutions inside the chip, magnetic hydrogel fiber and pure hydrogel fiber are achieved with controllable diameters. Patterning device and magnetic pillar were employed as a magnetic guidance to pattern and align the magnetic fibers. The proposed method for fabricating magnetic hydrogel fiber holds great potentials to engineer 3D tissue constructs with complex architectures and hierarchical vascular networks to mimic the native tissue microenvironment.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121498650","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720937
Junyang Li, C. Xue, Qiang Zhang, Libo Gao, Zhenyin Hai, Hongyan Xu, Dong Sun
This paper investigates different properties of the TiO2-SiO2-Fe3O4 core-shell nanoparticles encapsulated for 1 times, 2 times, 3 times (which are named as TSF1, TSF2 and TSF3 in this paper). The TSF nanoparticles were obtained through carbon reduction method and sol-gel method. The properties of the TSF1, TSF2 and TSF3 were characterized by Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), Vibratory Sample Magnetometer (VSM) and BET surface areas. The results show that the TSF2 exhibited better property than the others. The relationships between the irradiation time and decoloration rate of the TSF1, TSF2 and TSF3 indicate that the TSF2 has significant efficiency in decolorating the methyl orange under ultraviolet light.
{"title":"Investigation of TiO2-SiO2-Fe3O4 core-shell nanoparticle properties with different functional layer thickness","authors":"Junyang Li, C. Xue, Qiang Zhang, Libo Gao, Zhenyin Hai, Hongyan Xu, Dong Sun","doi":"10.1109/NANO.2013.6720937","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720937","url":null,"abstract":"This paper investigates different properties of the TiO2-SiO2-Fe3O4 core-shell nanoparticles encapsulated for 1 times, 2 times, 3 times (which are named as TSF1, TSF2 and TSF3 in this paper). The TSF nanoparticles were obtained through carbon reduction method and sol-gel method. The properties of the TSF1, TSF2 and TSF3 were characterized by Transmission Electron Microscope (TEM), X-ray Diffraction (XRD), Vibratory Sample Magnetometer (VSM) and BET surface areas. The results show that the TSF2 exhibited better property than the others. The relationships between the irradiation time and decoloration rate of the TSF1, TSF2 and TSF3 indicate that the TSF2 has significant efficiency in decolorating the methyl orange under ultraviolet light.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121755996","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720929
Chichun Lu, Y. Chu, Y. Tzeng
We report the application of nanodiamond prepared by microwave plasma chemical deposition system as the dielectric film with copper as top electrodes and a tungsten counter electrode for the fabrication of resistive random access memory (RRAM). The RRAM is switched between the high-resistivity state and a low-resistivity state of nanodiamond film. The high or low resistance state can be probed by applying a low voltage across two counter electrodes on two sides of the nanodiamond film and measuring its conduction current. We observed that the Cu/Nanodiamond/W structure shows good performance with ON/OFF current ratio >105 and retention time >104 s. Nanodiamond is known to be chemically inert, good for heat dissipation, and has very low solid solubility in copper. It is, therefore, a suitable dielectric material for RRAM for harsh environments.
{"title":"Resistive random access memories with nanodiamond dielectric films","authors":"Chichun Lu, Y. Chu, Y. Tzeng","doi":"10.1109/NANO.2013.6720929","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720929","url":null,"abstract":"We report the application of nanodiamond prepared by microwave plasma chemical deposition system as the dielectric film with copper as top electrodes and a tungsten counter electrode for the fabrication of resistive random access memory (RRAM). The RRAM is switched between the high-resistivity state and a low-resistivity state of nanodiamond film. The high or low resistance state can be probed by applying a low voltage across two counter electrodes on two sides of the nanodiamond film and measuring its conduction current. We observed that the Cu/Nanodiamond/W structure shows good performance with ON/OFF current ratio >105 and retention time >104 s. Nanodiamond is known to be chemically inert, good for heat dissipation, and has very low solid solubility in copper. It is, therefore, a suitable dielectric material for RRAM for harsh environments.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123807099","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720845
N. Banerjee, S. Roy, C. Sarkar, P. Bhattacharyya
In this paper we report on a high dynamic range Hydrogen sensor based on surface modified aligned ZnO hexagonal nanorods. ZnO nanorods were deposited by Chemical Bath Deposition (CBD) technique on SiO2 coated <;100> p-Si substrate. The nanorods having average diameter of 250-300 nm and average length of 400-500 nm is then surface sensitized by Palladium (Pd) nanoparticles. After structural and electrical characterization, both unmodified and surface modified nanorod based sensors were tested for Hydrogen (H2) detection in the resistive mode with Pd-Ag catalytic electrode. Both types of sensors offered appreciably high dynamic range (100ppm-20000ppm) at their respective operating temperature of 200°C and 150°C with corresponding response magnitude of ~76% and ~88%. Apart from improvement in response magnitude and reduction in the optimum operating temperature, the surface modification of nanorod also offered significant improvement (faster) in response time and recovery time. The high dynamic range of sensing (H2) makes this sensor useful for wide range of applications starting from domestic to commercial appliances.
{"title":"Pd modified ZnO nanorod based high dynamic range Hydrogen sensor","authors":"N. Banerjee, S. Roy, C. Sarkar, P. Bhattacharyya","doi":"10.1109/NANO.2013.6720845","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720845","url":null,"abstract":"In this paper we report on a high dynamic range Hydrogen sensor based on surface modified aligned ZnO hexagonal nanorods. ZnO nanorods were deposited by Chemical Bath Deposition (CBD) technique on SiO2 coated <;100> p-Si substrate. The nanorods having average diameter of 250-300 nm and average length of 400-500 nm is then surface sensitized by Palladium (Pd) nanoparticles. After structural and electrical characterization, both unmodified and surface modified nanorod based sensors were tested for Hydrogen (H2) detection in the resistive mode with Pd-Ag catalytic electrode. Both types of sensors offered appreciably high dynamic range (100ppm-20000ppm) at their respective operating temperature of 200°C and 150°C with corresponding response magnitude of ~76% and ~88%. Apart from improvement in response magnitude and reduction in the optimum operating temperature, the surface modification of nanorod also offered significant improvement (faster) in response time and recovery time. The high dynamic range of sensing (H2) makes this sensor useful for wide range of applications starting from domestic to commercial appliances.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131543694","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 : 2013-08-01DOI: 10.1109/NANO.2013.6721005
A. Ganesan, D. Kishore Kumar, Anomitra Banerjee, S. Swaminathan
ART guidelines of World Health Organization recommend a series of tests for HIV diagnostics (HIV antibody test, CD4 cell count and HIV viral load count). There are several modern technologies that are available to ensure reliable HIV diagnosis employing various principles. However, there is a need for point-of-care system that will eliminate the requirement of the patient to visit a hospital for initial diagnosis. In this paper, a novel design and analysis of MEMS based microfluidic chip facilitating point-of-care diagnostics is presented. The chip is based on the CD4 T+ cell count in blood. The device involves an array of silicon micro-needles each of length 250 microns, that would remove blood directly from the veins and feed it to a silicon micro-channel with alternating constrictions. These constrictions are coated with anti-CD4 Ab molecules to selectively adsorb CD4 T+ cells. An alternating current (AC) impedometric method is then used for discrimination and enumeration of these immobilized cells. The results strongly indicate the reliability of low-cost point of care diagnostics for HIV diagnosis.
{"title":"MEMS based microfluidic system for HIV detection","authors":"A. Ganesan, D. Kishore Kumar, Anomitra Banerjee, S. Swaminathan","doi":"10.1109/NANO.2013.6721005","DOIUrl":"https://doi.org/10.1109/NANO.2013.6721005","url":null,"abstract":"ART guidelines of World Health Organization recommend a series of tests for HIV diagnostics (HIV antibody test, CD4 cell count and HIV viral load count). There are several modern technologies that are available to ensure reliable HIV diagnosis employing various principles. However, there is a need for point-of-care system that will eliminate the requirement of the patient to visit a hospital for initial diagnosis. In this paper, a novel design and analysis of MEMS based microfluidic chip facilitating point-of-care diagnostics is presented. The chip is based on the CD4 T+ cell count in blood. The device involves an array of silicon micro-needles each of length 250 microns, that would remove blood directly from the veins and feed it to a silicon micro-channel with alternating constrictions. These constrictions are coated with anti-CD4 Ab molecules to selectively adsorb CD4 T+ cells. An alternating current (AC) impedometric method is then used for discrimination and enumeration of these immobilized cells. The results strongly indicate the reliability of low-cost point of care diagnostics for HIV diagnosis.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131603621","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720806
J. Jiu, T. Sugahara, M. Nogi, S. Nagao, K. Suganuma
Large-scale synthesis of silver nanowires (AgNWs) is achieved by an improved facile polyol method, with the diameter about 70 nm and the length exceeding 20 μm. The synthesized AgNWs can be processed to form a highly transparent thin film, making nanowire networks to realize high electrical conductivity. Simple oven heating and fast light sintering methods have been examined for curing the films, and achieved high transparency and excellent conductivity in both the cases. The obtained conductive transparent films of AgNW are expected to have a wide variety of applications such as solar cells, flat displays, and touch panel sensors in future.
{"title":"Silver nanowires transparent conductive films: Fabrication using different sintering techniques","authors":"J. Jiu, T. Sugahara, M. Nogi, S. Nagao, K. Suganuma","doi":"10.1109/NANO.2013.6720806","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720806","url":null,"abstract":"Large-scale synthesis of silver nanowires (AgNWs) is achieved by an improved facile polyol method, with the diameter about 70 nm and the length exceeding 20 μm. The synthesized AgNWs can be processed to form a highly transparent thin film, making nanowire networks to realize high electrical conductivity. Simple oven heating and fast light sintering methods have been examined for curing the films, and achieved high transparency and excellent conductivity in both the cases. The obtained conductive transparent films of AgNW are expected to have a wide variety of applications such as solar cells, flat displays, and touch panel sensors in future.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"275 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131617400","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720844
C. Yang, J. Chou, Yi-Hung Liao, Chia-Yu Liu, Pei-An Ho, C. Huang, Hsueh-Tao Chou
The objective of this study is to investigate the influence of surface roughness on electrochromic characteristics. The rough surface of indium tin oxide/glass (ITO/Glass) was prepared by wet etching. And the poly (3-methylthiophene) (PMeT) has been deposited on ITO/Glass by potentiostatic method. The electrochromic behaviors of the PMeT/ITO/Glass were performed in 0.1 M lithium perchlorate (LiClO4)/propylene carbonate (PC) electrolyte. Compared with the oxalic acid ((COOH)2·H2O) and ferric chloride + hydrochloric acid (FeCl3+HCl) solutions, the ITO/Glass has high surface roughness when the ITO/Glass was etched in (COOH)2·H2O solution. The PMeT/ITO/Glass has the best transmittance variation (ΔT(%)) (25 %) at 450 nm after the ITO/Glass was etched in (COOH)2·H2O solution for 160 sec. And, the PMeT/ITO/Glass has the best transmittance variation (ΔT(%)) (5 %) at 650 nm after the ITO/Glass was etched in FeCl3+HCl solution for 60 sec. Furthermore, the experimental results observed that the color of PMeT/ITO/Glass was changed from blue (oxidation state) to red (reduction state).
{"title":"The investigation of surface roughness of substrate on electrochromic characteristics for PMeT thin film","authors":"C. Yang, J. Chou, Yi-Hung Liao, Chia-Yu Liu, Pei-An Ho, C. Huang, Hsueh-Tao Chou","doi":"10.1109/NANO.2013.6720844","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720844","url":null,"abstract":"The objective of this study is to investigate the influence of surface roughness on electrochromic characteristics. The rough surface of indium tin oxide/glass (ITO/Glass) was prepared by wet etching. And the poly (3-methylthiophene) (PMeT) has been deposited on ITO/Glass by potentiostatic method. The electrochromic behaviors of the PMeT/ITO/Glass were performed in 0.1 M lithium perchlorate (LiClO<sub>4</sub>)/propylene carbonate (PC) electrolyte. Compared with the oxalic acid ((COOH)<sub>2</sub>·H<sub>2</sub>O) and ferric chloride + hydrochloric acid (FeCl<sub>3</sub>+HCl) solutions, the ITO/Glass has high surface roughness when the ITO/Glass was etched in (COOH)<sub>2</sub>·H<sub>2</sub>O solution. The PMeT/ITO/Glass has the best transmittance variation (ΔT(%)) (25 %) at 450 nm after the ITO/Glass was etched in (COOH)<sub>2</sub>·H<sub>2</sub>O solution for 160 sec. And, the PMeT/ITO/Glass has the best transmittance variation (ΔT(%)) (5 %) at 650 nm after the ITO/Glass was etched in FeCl<sub>3</sub>+HCl solution for 60 sec. Furthermore, the experimental results observed that the color of PMeT/ITO/Glass was changed from blue (oxidation state) to red (reduction state).","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130565018","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720990
Wanli Peng, C. Zandén, L. Ye, Xiuzhen Lu, Johan Liu
Continued miniaturization in combination with increased performance in microelectronics has generated an urgent need for improved thermal management techniques in order to maintain reliability in systems and devices. Thermal interface materials play a key role in the development of solutions for thermal management in microelectronics. In this paper, mechanical properties of a nanotechnology enhanced thermal interface material (Nano-TIM) were studied. The material is based on Sn-Ag-Cu based alloy reinforced with nano scale fiber matrix. Tensile tests were used to investigate and compare the elastic modulus at room temperature and mechanical strength between 20 to 100°C. Scanning Electron Microscopy (SEM) analysis techniques were used to investigate the morphology of the fracture section after tensile tests as well as the internal structure of the samples. The results show that the Nano-TIM can have a significantly lower elastic modulus compared to the pure alloy phase of SnAgCu due to its fiber phase. A lower elastic modulus of the solder joint can be important since it will reduce the stress transfer across the interface. This is particular important when the joint substrates have mismatching coefficients of thermal expansion. The findings of this study thus indicate that the Nano-TIM may provide a useful alternative to improve the thermomechanical reliability compared to pure solder joints.
{"title":"Mechanical properties of a novel nano-thermal interface material","authors":"Wanli Peng, C. Zandén, L. Ye, Xiuzhen Lu, Johan Liu","doi":"10.1109/NANO.2013.6720990","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720990","url":null,"abstract":"Continued miniaturization in combination with increased performance in microelectronics has generated an urgent need for improved thermal management techniques in order to maintain reliability in systems and devices. Thermal interface materials play a key role in the development of solutions for thermal management in microelectronics. In this paper, mechanical properties of a nanotechnology enhanced thermal interface material (Nano-TIM) were studied. The material is based on Sn-Ag-Cu based alloy reinforced with nano scale fiber matrix. Tensile tests were used to investigate and compare the elastic modulus at room temperature and mechanical strength between 20 to 100°C. Scanning Electron Microscopy (SEM) analysis techniques were used to investigate the morphology of the fracture section after tensile tests as well as the internal structure of the samples. The results show that the Nano-TIM can have a significantly lower elastic modulus compared to the pure alloy phase of SnAgCu due to its fiber phase. A lower elastic modulus of the solder joint can be important since it will reduce the stress transfer across the interface. This is particular important when the joint substrates have mismatching coefficients of thermal expansion. The findings of this study thus indicate that the Nano-TIM may provide a useful alternative to improve the thermomechanical reliability compared to pure solder joints.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130332034","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720909
David Gehlhausen, S. Menezes, Lichuan Chen, Gyu-ho Kim, Hongbing Lu, Jinming Gao, Walter Hu
We report an jet rollable nanoimprint lithography tool as a low cost method to produce micro- and nano-structures rapidly over large areas. We integrated a piezoelectric nozzle to deposit resist in-line in a low-waste, high-precision manner. We demonstrate the capabilities of this system by creating a variety of microstructures in SU8 resist with high pattern transfer fidelity.
{"title":"Jet rollable nanoimprint lithography with piezoelectric jetting of resist","authors":"David Gehlhausen, S. Menezes, Lichuan Chen, Gyu-ho Kim, Hongbing Lu, Jinming Gao, Walter Hu","doi":"10.1109/NANO.2013.6720909","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720909","url":null,"abstract":"We report an jet rollable nanoimprint lithography tool as a low cost method to produce micro- and nano-structures rapidly over large areas. We integrated a piezoelectric nozzle to deposit resist in-line in a low-waste, high-precision manner. We demonstrate the capabilities of this system by creating a variety of microstructures in SU8 resist with high pattern transfer fidelity.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"47 31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124719751","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 : 2013-08-01DOI: 10.1109/NANO.2013.6720797
Mei Zhang, Zuankai Wang
A facile one-step strategy to synthesize hybrid Ag NWs-graphene nanostructure for enhanced electrochemical detection of hydrogen peroxide was reported. The simple nature of our process leads to formation of Ag continuous and seamless integrated NWs-graphene hybrids with excellent interfacial electron transfer, avoiding the interface problems associated with the multiple-step process Interestingly, the one-step process also leads to the synergistic cooperation of graphene and Ag NWs: graphene promotes the continuous and preferential growth of long NWs by suppressing the deposition of undesirable Ag nanoparticles and short Ag NWs and facilitates the charge transfer and reactants transport by bridging the random Ag NWs, whereas Ag NWs prevents the aggregation of individual graphene sheet. By harnessing the synergy between individual constituents and their advantages, we show that the hybrid film exhibits enhanced electrochemical activity for the detection of H2O2. We envision that the new nanostructured electrode with enhanced electrocatalytic activity offers great promise for new class of biosensors in environmental and biomedical applications.
{"title":"Harnessing the synergistic cooperation of silver nanowires and graphene for enhanced electrochemical detection of hydrogen peroxide","authors":"Mei Zhang, Zuankai Wang","doi":"10.1109/NANO.2013.6720797","DOIUrl":"https://doi.org/10.1109/NANO.2013.6720797","url":null,"abstract":"A facile one-step strategy to synthesize hybrid Ag NWs-graphene nanostructure for enhanced electrochemical detection of hydrogen peroxide was reported. The simple nature of our process leads to formation of Ag continuous and seamless integrated NWs-graphene hybrids with excellent interfacial electron transfer, avoiding the interface problems associated with the multiple-step process Interestingly, the one-step process also leads to the synergistic cooperation of graphene and Ag NWs: graphene promotes the continuous and preferential growth of long NWs by suppressing the deposition of undesirable Ag nanoparticles and short Ag NWs and facilitates the charge transfer and reactants transport by bridging the random Ag NWs, whereas Ag NWs prevents the aggregation of individual graphene sheet. By harnessing the synergy between individual constituents and their advantages, we show that the hybrid film exhibits enhanced electrochemical activity for the detection of H2O2. We envision that the new nanostructured electrode with enhanced electrocatalytic activity offers great promise for new class of biosensors in environmental and biomedical applications.","PeriodicalId":189707,"journal":{"name":"2013 13th IEEE International Conference on Nanotechnology (IEEE-NANO 2013)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116536692","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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