The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Elisa Riedo - One of the best experts on this subject based on the ideXlab platform.
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advanced sCanning probe lithography
Nature Nanotechnology, 2014Co-Authors: Ricardo Garcia, Armin W Knoll, Elisa RiedoAbstract:This article reviews the fundamentals and applications of sCanning probe lithography, focusing on the methods that offer genuinely lithographic capabilities such as those based on thermal effects, chemical reactions and voltage-induced processes.
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Advanced sCanning probe lithography
Nature Nanotechnology, 2014Co-Authors: Ricardo Garcia, Armin W Knoll, Elisa RiedoAbstract:The nanoscale control afforded by sCanning probe microscopes has prompted the development of a wide variety of sCanning-probe-based patterning methods. Some of these methods have demonstrated a high degree of robustness and patterning capabilities that are unmatched by other lithographic techniques. However, the limited throughput of sCanning probe lithography has prevented its exploitation in technological applications. Here, we review the fundamentals of sCanning probe lithography and its use in materials science and nanotechnology. We focus on robust methods, such as those based on thermal effects, chemical reactions and voltage-induced processes, that demonstrate a potential for applications. This article reviews the fundamentals and applications of sCanning probe lithography, focusing on the methods that offer genuinely lithographic capabilities such as those based on thermal effects, chemical reactions and voltage-induced processes.
Christoph Schick - One of the best experts on this subject based on the ideXlab platform.
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fast sCanning power compensated differential sCanning nano calorimeter 1 the device
Thermochimica Acta, 2010Co-Authors: Evgeny Zhuravlev, Christoph SchickAbstract:Fast sCanning calorimetry becomes more and more important because an increasing number of materials are created or used far from thermodynamic equilibrium. Fast sCanning, especially on cooling, allows for the in situ investigation of structure formation, which is of particular interest in a wide range of materials like polymers, metals, and pharmaceuticals to name a few. Freestanding silicon nitride membranes are commonly used as low addenda heat capacity fast sCanning calorimetric sensors. A differential setup based on commercially available sensors is described. To enhance performance of the device a new asymmetric power compensation scheme was developed. The hardware realization of the scheme and calculation of differential power are presented in the first part of this paper. The fast analog amplifiers allow calorimetric measurements up to 100,000 K/s. The lower limit is defined by the sensitivity of the device and is 1 K/s for sharp melting or crystallization events in metals and ca. 100 K/s for broad transitions in polymers. Another limiting factor is accuracy of sample temperature measurement. A strong dependency of temperature on sample placement on the sensor is observed; even reproducibility is within ±1 K. For finite sample thicknesses the commonly observed thermal lag must be considered too. Uncertainty of the temperature measurement based on previous thermopile calibration is in the order of ±10 K. A significant improvement is possible by adding a small particle of a temperature calibration standard, e.g. indium or tin, on top of the sample under investigation. Then uncertainty is about ±3 K. The second part of the paper describes sample heat capacity determination and an example to demonstrate the performance of the device.
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fast sCanning power compensated differential sCanning nano calorimeter 2 heat capacity analysis
Thermochimica Acta, 2010Co-Authors: Evgeny Zhuravlev, Christoph SchickAbstract:Fast sCanning calorimetry is an attractive tool to study kinetics and thermodynamics of materials created or used far from thermodynamic equilibrium. In the first part of this paper we describe a differential fast sCanning nano-calorimeter utilizing a new power compensation scheme. The device is suitable for calorimetric experiments at controlled cooling and heating rates between 1 and 100,000 K/s. This part of the paper focuses on determination of specific heat capacity out of the measured data. Assuming time independent heat losses for sample and reference sensors at heating and cooling makes possible a heat capacity analysis based on symmetry arguments. The described procedure is not limited to chipbased fast sCanning devices but can be applied to common DSC too. Due to the differential scheme and power compensation heat capacity of polymer samples with sample mass of a few 10 ng is available. Reproducibility of heat capacity is in the order of ±2% at optimum sCanning rates. Uncertainty of specific heat capacity strongly depends on sample mass determination and is in the order of ±10%. Adding a small particle of a temperature calibration standard, e.g. indium or tin, on top of the polymer sample reduces uncertainty of temperature to about ± 4K .
Ricardo Garcia - One of the best experts on this subject based on the ideXlab platform.
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advanced sCanning probe lithography
Nature Nanotechnology, 2014Co-Authors: Ricardo Garcia, Armin W Knoll, Elisa RiedoAbstract:This article reviews the fundamentals and applications of sCanning probe lithography, focusing on the methods that offer genuinely lithographic capabilities such as those based on thermal effects, chemical reactions and voltage-induced processes.
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Advanced sCanning probe lithography
Nature Nanotechnology, 2014Co-Authors: Ricardo Garcia, Armin W Knoll, Elisa RiedoAbstract:The nanoscale control afforded by sCanning probe microscopes has prompted the development of a wide variety of sCanning-probe-based patterning methods. Some of these methods have demonstrated a high degree of robustness and patterning capabilities that are unmatched by other lithographic techniques. However, the limited throughput of sCanning probe lithography has prevented its exploitation in technological applications. Here, we review the fundamentals of sCanning probe lithography and its use in materials science and nanotechnology. We focus on robust methods, such as those based on thermal effects, chemical reactions and voltage-induced processes, that demonstrate a potential for applications. This article reviews the fundamentals and applications of sCanning probe lithography, focusing on the methods that offer genuinely lithographic capabilities such as those based on thermal effects, chemical reactions and voltage-induced processes.
Evgeny Zhuravlev - One of the best experts on this subject based on the ideXlab platform.
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fast sCanning power compensated differential sCanning nano calorimeter 1 the device
Thermochimica Acta, 2010Co-Authors: Evgeny Zhuravlev, Christoph SchickAbstract:Fast sCanning calorimetry becomes more and more important because an increasing number of materials are created or used far from thermodynamic equilibrium. Fast sCanning, especially on cooling, allows for the in situ investigation of structure formation, which is of particular interest in a wide range of materials like polymers, metals, and pharmaceuticals to name a few. Freestanding silicon nitride membranes are commonly used as low addenda heat capacity fast sCanning calorimetric sensors. A differential setup based on commercially available sensors is described. To enhance performance of the device a new asymmetric power compensation scheme was developed. The hardware realization of the scheme and calculation of differential power are presented in the first part of this paper. The fast analog amplifiers allow calorimetric measurements up to 100,000 K/s. The lower limit is defined by the sensitivity of the device and is 1 K/s for sharp melting or crystallization events in metals and ca. 100 K/s for broad transitions in polymers. Another limiting factor is accuracy of sample temperature measurement. A strong dependency of temperature on sample placement on the sensor is observed; even reproducibility is within ±1 K. For finite sample thicknesses the commonly observed thermal lag must be considered too. Uncertainty of the temperature measurement based on previous thermopile calibration is in the order of ±10 K. A significant improvement is possible by adding a small particle of a temperature calibration standard, e.g. indium or tin, on top of the sample under investigation. Then uncertainty is about ±3 K. The second part of the paper describes sample heat capacity determination and an example to demonstrate the performance of the device.
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fast sCanning power compensated differential sCanning nano calorimeter 2 heat capacity analysis
Thermochimica Acta, 2010Co-Authors: Evgeny Zhuravlev, Christoph SchickAbstract:Fast sCanning calorimetry is an attractive tool to study kinetics and thermodynamics of materials created or used far from thermodynamic equilibrium. In the first part of this paper we describe a differential fast sCanning nano-calorimeter utilizing a new power compensation scheme. The device is suitable for calorimetric experiments at controlled cooling and heating rates between 1 and 100,000 K/s. This part of the paper focuses on determination of specific heat capacity out of the measured data. Assuming time independent heat losses for sample and reference sensors at heating and cooling makes possible a heat capacity analysis based on symmetry arguments. The described procedure is not limited to chipbased fast sCanning devices but can be applied to common DSC too. Due to the differential scheme and power compensation heat capacity of polymer samples with sample mass of a few 10 ng is available. Reproducibility of heat capacity is in the order of ±2% at optimum sCanning rates. Uncertainty of specific heat capacity strongly depends on sample mass determination and is in the order of ±10%. Adding a small particle of a temperature calibration standard, e.g. indium or tin, on top of the polymer sample reduces uncertainty of temperature to about ± 4K .
Armin W Knoll - One of the best experts on this subject based on the ideXlab platform.
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advanced sCanning probe lithography
Nature Nanotechnology, 2014Co-Authors: Ricardo Garcia, Armin W Knoll, Elisa RiedoAbstract:This article reviews the fundamentals and applications of sCanning probe lithography, focusing on the methods that offer genuinely lithographic capabilities such as those based on thermal effects, chemical reactions and voltage-induced processes.
-
Advanced sCanning probe lithography
Nature Nanotechnology, 2014Co-Authors: Ricardo Garcia, Armin W Knoll, Elisa RiedoAbstract:The nanoscale control afforded by sCanning probe microscopes has prompted the development of a wide variety of sCanning-probe-based patterning methods. Some of these methods have demonstrated a high degree of robustness and patterning capabilities that are unmatched by other lithographic techniques. However, the limited throughput of sCanning probe lithography has prevented its exploitation in technological applications. Here, we review the fundamentals of sCanning probe lithography and its use in materials science and nanotechnology. We focus on robust methods, such as those based on thermal effects, chemical reactions and voltage-induced processes, that demonstrate a potential for applications. This article reviews the fundamentals and applications of sCanning probe lithography, focusing on the methods that offer genuinely lithographic capabilities such as those based on thermal effects, chemical reactions and voltage-induced processes.
