The Experts below are selected from a list of 181017 Experts worldwide ranked by ideXlab platform
Jong Hee Lee - One of the best experts on this subject based on the ideXlab platform.
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scalable growth of free standing graphene wafers with Copper Cu catalyst on sio2 si substrate thermal conductivity of the wafers
Applied Physics Letters, 2010Co-Authors: Yun Hi Lee, Jong Hee LeeAbstract:The authors report scalable growth of free-standing graphene wafers with Copper(Cu) catalyst on SiO 2 / Si substrate at low temperature and investigation of their thermal conductivity. The Cu is the most common and the cheapest catalyst among electronic materials. Our process for producing the graphene with the Cu is based on a low-pressure, fast-heating chemical vapor deposition method. Thermal conductivity measurements with nondestructive Raman spectroscopy showed that the free-standing-graphene is a good thermal conductor. The possibility of growinggraphene wafer at low temperatures by using a Cuthin film should accelerate research and facilitate the development of graphene for practical applications
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Scalable growth of free-standing graphene wafers with Copper(Cu) catalyst on SiO2/Si substrate: Thermal conductivity of the wafers
Applied Physics Letters, 2010Co-Authors: Yun Hi Lee, Jong Hee LeeAbstract:The authors report scalable growth of free-standing graphene wafers with CopperCu catalyst on SiO2/Si substrate at low temperature and investigation of their thermal conductivity. The Cu is the most common and the cheapest catalyst among electronic materials. Our process for producing the graphene with the Cu is based on a low-pressure, fast-heating chemical vapor deposition method. Thermal conductivity measurements with nondestructive Raman spectroscopy showed that the free-standing-graphene is a good thermal conductor. The possibility of growing graphene wafer at low temperatures by using a Cu thin film should accelerate research and facilitate the development of graphene for practical applications ©
Yun Hi Lee - One of the best experts on this subject based on the ideXlab platform.
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scalable growth of free standing graphene wafers with Copper Cu catalyst on sio2 si substrate thermal conductivity of the wafers
Applied Physics Letters, 2010Co-Authors: Yun Hi Lee, Jong Hee LeeAbstract:The authors report scalable growth of free-standing graphene wafers with Copper(Cu) catalyst on SiO 2 / Si substrate at low temperature and investigation of their thermal conductivity. The Cu is the most common and the cheapest catalyst among electronic materials. Our process for producing the graphene with the Cu is based on a low-pressure, fast-heating chemical vapor deposition method. Thermal conductivity measurements with nondestructive Raman spectroscopy showed that the free-standing-graphene is a good thermal conductor. The possibility of growinggraphene wafer at low temperatures by using a Cuthin film should accelerate research and facilitate the development of graphene for practical applications
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Scalable growth of free-standing graphene wafers with Copper(Cu) catalyst on SiO2/Si substrate: Thermal conductivity of the wafers
Applied Physics Letters, 2010Co-Authors: Yun Hi Lee, Jong Hee LeeAbstract:The authors report scalable growth of free-standing graphene wafers with CopperCu catalyst on SiO2/Si substrate at low temperature and investigation of their thermal conductivity. The Cu is the most common and the cheapest catalyst among electronic materials. Our process for producing the graphene with the Cu is based on a low-pressure, fast-heating chemical vapor deposition method. Thermal conductivity measurements with nondestructive Raman spectroscopy showed that the free-standing-graphene is a good thermal conductor. The possibility of growing graphene wafer at low temperatures by using a Cu thin film should accelerate research and facilitate the development of graphene for practical applications ©
Constantinos Sioutas - One of the best experts on this subject based on the ideXlab platform.
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A new technique for online measurement of total and water-soluble Copper (Cu) in coarse partiCulate matter (PM).
Environmental pollution (Barking Essex : 1987), 2015Co-Authors: Dongbin Wang, Martin M. Shafer, James J. Schauer, Constantinos SioutasAbstract:Abstract This study presents a novel system for online, field measurement of Copper (Cu) in ambient coarse (2.5–10 μm) partiCulate matter (PM). This new system utilizes two virtual impactors combined with a modified liquid impinger (BioSampler) to collect coarse PM directly as concentrated slurry samples. The total and water-soluble Cu concentrations are subsequently measured by a Copper Ion Selective Electrode (ISE). Laboratory evaluation results indicated excellent collection efficiency (over 85%) for particles in the coarse PM size ranges. In the field evaluations, very good agreements for both total and water-soluble Cu concentrations were obtained between online ISE-based monitor measurements and those analyzed by means of inductively coupled plasma mass spectrometry (ICP-MS). Moreover, the field tests indicated that the Cu monitor could achieve near-continuous operation for at least 6 conseCutive days (a time resolution of 2–4 h) without obvious shortcomings.
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Development of a Technology for Online Measurement of Total and Water-Soluble Copper (Cu) in PM2.5
Aerosol Science and Technology, 2014Co-Authors: Dongbin Wang, Martin M. Shafer, James J. Schauer, Constantinos SioutasAbstract:A novel monitor for online, in situ measurement of Copper (Cu) in ambient fine and ultrafine partiCulate matter (PM) was developed based on a recent published high flow rate aerosol-into-liquid collector. This aerosol-into-liquid collector operates at 200 L/min flow and collects particles directly as highly concentrated slurry samples. The Cu concentration in slurry samples is subsequently determined by a Cupric ion selective electrode (ISE). Laboratory tests were conducted to evaluate the performance of the Cupric ISE. The calibration Curve of the Cupric ISE was determined using Cu(NO3)2 standard solutions prepared by serial dilution. As part of the evaluation, the effects of ionic strength, temperature and pH of the aerosol slurry sample on the Cupric ISE measurement were also evaluated. The Cu measurement system performance was evaluated by collecting and measuring samples of lab-generated Cu(NO3)2 aerosols with known mass concentration. Overall, very good agreement between the theoretical and measured...
Dongbin Wang - One of the best experts on this subject based on the ideXlab platform.
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A new technique for online measurement of total and water-soluble Copper (Cu) in coarse partiCulate matter (PM).
Environmental pollution (Barking Essex : 1987), 2015Co-Authors: Dongbin Wang, Martin M. Shafer, James J. Schauer, Constantinos SioutasAbstract:Abstract This study presents a novel system for online, field measurement of Copper (Cu) in ambient coarse (2.5–10 μm) partiCulate matter (PM). This new system utilizes two virtual impactors combined with a modified liquid impinger (BioSampler) to collect coarse PM directly as concentrated slurry samples. The total and water-soluble Cu concentrations are subsequently measured by a Copper Ion Selective Electrode (ISE). Laboratory evaluation results indicated excellent collection efficiency (over 85%) for particles in the coarse PM size ranges. In the field evaluations, very good agreements for both total and water-soluble Cu concentrations were obtained between online ISE-based monitor measurements and those analyzed by means of inductively coupled plasma mass spectrometry (ICP-MS). Moreover, the field tests indicated that the Cu monitor could achieve near-continuous operation for at least 6 conseCutive days (a time resolution of 2–4 h) without obvious shortcomings.
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Development of a Technology for Online Measurement of Total and Water-Soluble Copper (Cu) in PM2.5
Aerosol Science and Technology, 2014Co-Authors: Dongbin Wang, Martin M. Shafer, James J. Schauer, Constantinos SioutasAbstract:A novel monitor for online, in situ measurement of Copper (Cu) in ambient fine and ultrafine partiCulate matter (PM) was developed based on a recent published high flow rate aerosol-into-liquid collector. This aerosol-into-liquid collector operates at 200 L/min flow and collects particles directly as highly concentrated slurry samples. The Cu concentration in slurry samples is subsequently determined by a Cupric ion selective electrode (ISE). Laboratory tests were conducted to evaluate the performance of the Cupric ISE. The calibration Curve of the Cupric ISE was determined using Cu(NO3)2 standard solutions prepared by serial dilution. As part of the evaluation, the effects of ionic strength, temperature and pH of the aerosol slurry sample on the Cupric ISE measurement were also evaluated. The Cu measurement system performance was evaluated by collecting and measuring samples of lab-generated Cu(NO3)2 aerosols with known mass concentration. Overall, very good agreement between the theoretical and measured...
James J. Schauer - One of the best experts on this subject based on the ideXlab platform.
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A new technique for online measurement of total and water-soluble Copper (Cu) in coarse partiCulate matter (PM).
Environmental pollution (Barking Essex : 1987), 2015Co-Authors: Dongbin Wang, Martin M. Shafer, James J. Schauer, Constantinos SioutasAbstract:Abstract This study presents a novel system for online, field measurement of Copper (Cu) in ambient coarse (2.5–10 μm) partiCulate matter (PM). This new system utilizes two virtual impactors combined with a modified liquid impinger (BioSampler) to collect coarse PM directly as concentrated slurry samples. The total and water-soluble Cu concentrations are subsequently measured by a Copper Ion Selective Electrode (ISE). Laboratory evaluation results indicated excellent collection efficiency (over 85%) for particles in the coarse PM size ranges. In the field evaluations, very good agreements for both total and water-soluble Cu concentrations were obtained between online ISE-based monitor measurements and those analyzed by means of inductively coupled plasma mass spectrometry (ICP-MS). Moreover, the field tests indicated that the Cu monitor could achieve near-continuous operation for at least 6 conseCutive days (a time resolution of 2–4 h) without obvious shortcomings.
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Development of a Technology for Online Measurement of Total and Water-Soluble Copper (Cu) in PM2.5
Aerosol Science and Technology, 2014Co-Authors: Dongbin Wang, Martin M. Shafer, James J. Schauer, Constantinos SioutasAbstract:A novel monitor for online, in situ measurement of Copper (Cu) in ambient fine and ultrafine partiCulate matter (PM) was developed based on a recent published high flow rate aerosol-into-liquid collector. This aerosol-into-liquid collector operates at 200 L/min flow and collects particles directly as highly concentrated slurry samples. The Cu concentration in slurry samples is subsequently determined by a Cupric ion selective electrode (ISE). Laboratory tests were conducted to evaluate the performance of the Cupric ISE. The calibration Curve of the Cupric ISE was determined using Cu(NO3)2 standard solutions prepared by serial dilution. As part of the evaluation, the effects of ionic strength, temperature and pH of the aerosol slurry sample on the Cupric ISE measurement were also evaluated. The Cu measurement system performance was evaluated by collecting and measuring samples of lab-generated Cu(NO3)2 aerosols with known mass concentration. Overall, very good agreement between the theoretical and measured...