Juan Burgos - Academia.edu (original) (raw)

Papers by Juan Burgos

Research paper thumbnail of Ébola

Sanidad Militar, 2014

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Research paper thumbnail of Comparison Between Control Systems in a Doubly Fed Induction Generator Connected to an Electric Grid

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Research paper thumbnail of Application of 2D linear models for computing zero-sequence magnetizing impedances of 3-phase core-type transformers

Electric Power Systems Research, 2014

ABSTRACT

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Research paper thumbnail of About the difference between zero-sequence magnetizing impedances of a 3-phase core-type transformer

Electric Power Systems Research, 2014

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Research paper thumbnail of Carbon Nanotubes

Progress in Molecular Biology and Translational Science, 2011

Carbon nanotubes (CNTs) are cylinder-shaped allotropic forms of carbon, most widely produced unde... more Carbon nanotubes (CNTs) are cylinder-shaped allotropic forms of carbon, most widely produced under chemical vapor deposition. They possess astounding chemical, electronic, mechanical, and optical properties. Being among the most promising materials in nanotechnology, they are also likely to revolutionize medicine. Among other biomedical applications, after proper functionalization carbon nanotubes can be transformed into sophisticated biosensing and biocompatible drug-delivery systems, for specific targeting and elimination of tumor cells. This chapter provides an introduction to the chemical and electronic structure and properties of single-walled carbon nanotubes, followed by a description of the main synthesis and post-synthesis methods. These sections allow the reader to become familiar with the specific characteristics of these materials and the manner in which these properties may be dependent on the specific synthesis and post-synthesis processes. The chapter ends with a review of the current biomedical applications of carbon nanotubes, highlighting successes and challenges.

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Research paper thumbnail of Comparison of methods for measuring zero sequence impedances in 3-phase core-type transformers

2012 47th International Universities Power Engineering Conference (UPEC), 2012

ABSTRACT

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Research paper thumbnail of Dynamics of Topological Defects in Single-Walled Carbon Nanotubes during Catalytic Growth

The Journal of Physical Chemistry C, 2014

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Research paper thumbnail of Preferential Adsorption of Zigzag Single-Walled Carbon Nanotubes on the ST-Cut Surface of Quartz

The Journal of Physical Chemistry C, 2013

ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved h... more ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved high degree of orientation and selectivity when specific cuts of quartz surfaces are used as support. In this study we demonstrate that finite-length zigzag nanotubes are adsorbed stronger than armchair tubes on the quartz support. This is done through density functional theory calculations that evaluate the interaction between SWCNTs and the ST-cut surface of the quartz substrate. Among the nanotubes studied, the (7,0) presents the strongest adsorption energy, found along the [010] direction, which is parallel to the y-axis. Unexpectedly, patterns delineated by silicon and oxygen atoms along the [010] direction established the strongest as well as the weakest adsorption energies. This suggests that the nanotube electronic band structure is a key factor on the preferential adsorption of zigzag tubes. Charge analysis demonstrates the role of oxygen atoms on the partial oxidation of nanotube atoms closest to the substrate. Finally, the analysis of the electronic density of states proves that atomic interactions between substrate and nanotubes induce modifications of the occupied states near to the Fermi level, which can potentially modify the metallic or semiconducting character in adsorbed SWCNTs.

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Research paper thumbnail of Growth of Carbon Structures on Stepped (211)Co Surfaces

The Journal of Physical Chemistry C, 2009

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Research paper thumbnail of Automatic generation control of a wind farm with variable speed wind turbines

IEEE Transactions on Electronic Computers, 2002

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Research paper thumbnail of Control of permanent-magnet generators applied to variable-speed wind-energy systems connected to the grid

IEEE Transactions on Electronic Computers, 2006

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Research paper thumbnail of Ébola

Sanidad Militar, 2014

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Research paper thumbnail of Comparison Between Control Systems in a Doubly Fed Induction Generator Connected to an Electric Grid

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Research paper thumbnail of Application of 2D linear models for computing zero-sequence magnetizing impedances of 3-phase core-type transformers

Electric Power Systems Research, 2014

ABSTRACT

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Research paper thumbnail of About the difference between zero-sequence magnetizing impedances of a 3-phase core-type transformer

Electric Power Systems Research, 2014

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Research paper thumbnail of Carbon Nanotubes

Progress in Molecular Biology and Translational Science, 2011

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Research paper thumbnail of Comparison of methods for measuring zero sequence impedances in 3-phase core-type transformers

2012 47th International Universities Power Engineering Conference (UPEC), 2012

ABSTRACT

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Research paper thumbnail of Dynamics of Topological Defects in Single-Walled Carbon Nanotubes during Catalytic Growth

The Journal of Physical Chemistry C, 2014

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Research paper thumbnail of Preferential Adsorption of Zigzag Single-Walled Carbon Nanotubes on the ST-Cut Surface of Quartz

The Journal of Physical Chemistry C, 2013

ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved h... more ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved high degree of orientation and selectivity when specific cuts of quartz surfaces are used as support. In this study we demonstrate that finite-length zigzag nanotubes are adsorbed stronger than armchair tubes on the quartz support. This is done through density functional theory calculations that evaluate the interaction between SWCNTs and the ST-cut surface of the quartz substrate. Among the nanotubes studied, the (7,0) presents the strongest adsorption energy, found along the [010] direction, which is parallel to the y-axis. Unexpectedly, patterns delineated by silicon and oxygen atoms along the [010] direction established the strongest as well as the weakest adsorption energies. This suggests that the nanotube electronic band structure is a key factor on the preferential adsorption of zigzag tubes. Charge analysis demonstrates the role of oxygen atoms on the partial oxidation of nanotube atoms closest to the substrate. Finally, the analysis of the electronic density of states proves that atomic interactions between substrate and nanotubes induce modifications of the occupied states near to the Fermi level, which can potentially modify the metallic or semiconducting character in adsorbed SWCNTs.

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Research paper thumbnail of Growth of Carbon Structures on Stepped (211)Co Surfaces

The Journal of Physical Chemistry C, 2009

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Research paper thumbnail of Ébola

Sanidad Militar, 2014

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Research paper thumbnail of Comparison Between Control Systems in a Doubly Fed Induction Generator Connected to an Electric Grid

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Application of 2D linear models for computing zero-sequence magnetizing impedances of 3-phase core-type transformers

Electric Power Systems Research, 2014

ABSTRACT

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Research paper thumbnail of About the difference between zero-sequence magnetizing impedances of a 3-phase core-type transformer

Electric Power Systems Research, 2014

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Research paper thumbnail of Carbon Nanotubes

Progress in Molecular Biology and Translational Science, 2011

Carbon nanotubes (CNTs) are cylinder-shaped allotropic forms of carbon, most widely produced unde... more Carbon nanotubes (CNTs) are cylinder-shaped allotropic forms of carbon, most widely produced under chemical vapor deposition. They possess astounding chemical, electronic, mechanical, and optical properties. Being among the most promising materials in nanotechnology, they are also likely to revolutionize medicine. Among other biomedical applications, after proper functionalization carbon nanotubes can be transformed into sophisticated biosensing and biocompatible drug-delivery systems, for specific targeting and elimination of tumor cells. This chapter provides an introduction to the chemical and electronic structure and properties of single-walled carbon nanotubes, followed by a description of the main synthesis and post-synthesis methods. These sections allow the reader to become familiar with the specific characteristics of these materials and the manner in which these properties may be dependent on the specific synthesis and post-synthesis processes. The chapter ends with a review of the current biomedical applications of carbon nanotubes, highlighting successes and challenges.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Comparison of methods for measuring zero sequence impedances in 3-phase core-type transformers

2012 47th International Universities Power Engineering Conference (UPEC), 2012

ABSTRACT

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Research paper thumbnail of Dynamics of Topological Defects in Single-Walled Carbon Nanotubes during Catalytic Growth

The Journal of Physical Chemistry C, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Preferential Adsorption of Zigzag Single-Walled Carbon Nanotubes on the ST-Cut Surface of Quartz

The Journal of Physical Chemistry C, 2013

ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved h... more ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved high degree of orientation and selectivity when specific cuts of quartz surfaces are used as support. In this study we demonstrate that finite-length zigzag nanotubes are adsorbed stronger than armchair tubes on the quartz support. This is done through density functional theory calculations that evaluate the interaction between SWCNTs and the ST-cut surface of the quartz substrate. Among the nanotubes studied, the (7,0) presents the strongest adsorption energy, found along the [010] direction, which is parallel to the y-axis. Unexpectedly, patterns delineated by silicon and oxygen atoms along the [010] direction established the strongest as well as the weakest adsorption energies. This suggests that the nanotube electronic band structure is a key factor on the preferential adsorption of zigzag tubes. Charge analysis demonstrates the role of oxygen atoms on the partial oxidation of nanotube atoms closest to the substrate. Finally, the analysis of the electronic density of states proves that atomic interactions between substrate and nanotubes induce modifications of the occupied states near to the Fermi level, which can potentially modify the metallic or semiconducting character in adsorbed SWCNTs.

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Research paper thumbnail of Growth of Carbon Structures on Stepped (211)Co Surfaces

The Journal of Physical Chemistry C, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Automatic generation control of a wind farm with variable speed wind turbines

IEEE Transactions on Electronic Computers, 2002

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Research paper thumbnail of Control of permanent-magnet generators applied to variable-speed wind-energy systems connected to the grid

IEEE Transactions on Electronic Computers, 2006

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Research paper thumbnail of Ébola

Sanidad Militar, 2014

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Research paper thumbnail of Comparison Between Control Systems in a Doubly Fed Induction Generator Connected to an Electric Grid

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Application of 2D linear models for computing zero-sequence magnetizing impedances of 3-phase core-type transformers

Electric Power Systems Research, 2014

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of About the difference between zero-sequence magnetizing impedances of a 3-phase core-type transformer

Electric Power Systems Research, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Carbon Nanotubes

Progress in Molecular Biology and Translational Science, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Comparison of methods for measuring zero sequence impedances in 3-phase core-type transformers

2012 47th International Universities Power Engineering Conference (UPEC), 2012

ABSTRACT

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Dynamics of Topological Defects in Single-Walled Carbon Nanotubes during Catalytic Growth

The Journal of Physical Chemistry C, 2014

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Preferential Adsorption of Zigzag Single-Walled Carbon Nanotubes on the ST-Cut Surface of Quartz

The Journal of Physical Chemistry C, 2013

ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved h... more ABSTRACT Synthesis of horizontally aligned single-walled carbon nanotubes (SWCNTs) has achieved high degree of orientation and selectivity when specific cuts of quartz surfaces are used as support. In this study we demonstrate that finite-length zigzag nanotubes are adsorbed stronger than armchair tubes on the quartz support. This is done through density functional theory calculations that evaluate the interaction between SWCNTs and the ST-cut surface of the quartz substrate. Among the nanotubes studied, the (7,0) presents the strongest adsorption energy, found along the [010] direction, which is parallel to the y-axis. Unexpectedly, patterns delineated by silicon and oxygen atoms along the [010] direction established the strongest as well as the weakest adsorption energies. This suggests that the nanotube electronic band structure is a key factor on the preferential adsorption of zigzag tubes. Charge analysis demonstrates the role of oxygen atoms on the partial oxidation of nanotube atoms closest to the substrate. Finally, the analysis of the electronic density of states proves that atomic interactions between substrate and nanotubes induce modifications of the occupied states near to the Fermi level, which can potentially modify the metallic or semiconducting character in adsorbed SWCNTs.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Growth of Carbon Structures on Stepped (211)Co Surfaces

The Journal of Physical Chemistry C, 2009

Bookmarks Related papers MentionsView impact