3篇
您的检索式：作者名="Sebastian Calderon"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Influence of Carbon Nanofiber Properties as Eleetrocatalyst Support on the Electrochemical Performance for PEM Fuel Cells 显示文摘 | SEBASTIAN D CALDERON J C GONZALEZ-EXPOSITO J A | 2010 | International Journal of Hydrogen Energy2010，35，： | 1 |
| 2 | A Heterodyne Interferometer with Separated Beam Paths for High-Precision Displacement and Angular Measurements显示文摘As standard concepts for precision positioning within a machine reach their limits with increasing measurement volumes,inverse concepts are a promising approach for addressing this problem.The inverse principle entails other limitations,as for high-precision positioning of a sensor head within a large measurement volume,three four-beam interferometers are required in order to measure all necessary translations and rotations of the sensor head and reconstruct the topography of the reference system consisting of fixed mirrors in the x-,y-,and z-directions.We present the principle of a passive heterodyne laser interferometer with consequently separated beam paths for the individual heterodyne frequencies.The beam path design is illustrated and described,as well as the design of the signal-processing and evaluation algorithm,which is implemented using a System-On-a-Chip with an integrated FPGA,CPU,and A/D converters.A streamlined bench-top optical assembly was set up and measurements were carried out to investigate the remaining non-linearities.Additionally,reference measurements with a commercial homodyne interferometer were executed. | Guido Straube Juan Sebastian Fischer Calderon Ingo Ortlepp Roland FuBl Eberhard Manske | 2021 | Nanomanufacturing and Metrology2021，4，3： | 1 |
| 3 | Exploring the synthesis conditions to control the morphology of gold-iron oxide heterostructures显示文摘Gold-iron oxide nano-heterostructures with a clear and well-defined morphology were prepared via a seed-assisted method. The synthesis process and the events of heterogeneous nucleation during the decomposition of the iron precursor were carefully studied in order to understand the mechanism of the reaction and to tailor the architecture of the fabricated heterostructures. When employing Au seeds of 3 and 5 nm, nanoparticles with a dimer-like morphology were produced due to the occurrence of a single iron oxide nucleation event. Otherwise, multi-nucleation events could be favored by two mechanisms:(i) by the incorporation of a reducing agent and the slowing down of the heating protocol, leading to a core-shell system;(ii) by the increase of the Au seed size to 8 nm, leading to a flower-like system. Further increase of the Au seed size to 12 nm using similar synthesis conditions promotes the homogeneous nucleation and growth of the iron oxide phase, without formation of heterostructures. An in-depth study was performed on the gold-iron oxide heterostructures to confirm the epitaxial growth of the oxide domain over the Au seed and to analyze the elemental distribution of the components within the heterostructures. Finally, it was found that the modification of the plasmonic properties of the Au nanoparticles are strongly influenced by the architecture of the heterostructure, with a more pronounced damping effect for the systems produced after multi-nucleation events. | Pablo Tancredi Luelc Souza da Costa Sebastian Calderon Oscar Moscoso-Londono Leandro M. Socolovsky Paulo J. Ferreira Diego Muraca Daniela Zanchet Marcelo Knobel | 2019 | Nano Research2019，12，8： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员