Luis Guillermo Villanueva Torrijo

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Related publications (232)

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Stress-Induced Variations in the Stiffness of Micro- and Nanocantilever Beams

Luis Guillermo Villanueva Torrijo

The effect of surface stress on the stiffness of cantilever beams remains an outstanding problem in the physical sciences. While numerous experimental studies report significant stiffness change due to surface stress, theoretical predictions are unable to ...

American Physical Society2012

Passive Phase Noise Cancellation Scheme

Luis Guillermo Villanueva Torrijo

We introduce a new method for reducing phase noise in oscillators, thereby improving their frequency precision. The noise reduction is realized by a passive device consisting of a pair of coupled nonlinear resonating elements that are driven parametrically ...

American Physical Society2012

Optimal operating points of oscillators using nonlinear resonators

Luis Guillermo Villanueva Torrijo

We demonstrate an analytical method for calculating the phase sensitivity of a class of oscillators whose phase does not affect the time evolution of the other dynamic variables. We show that such oscillators possess the possibility for complete phase nois ...

2012

Reliable and Improved Nanoscale Stencil Lithography by Membrane Stabilization, Blurring and Clogging Corrections

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Andreea Veronica Savu, Oscar Vazquez Mena, Katrin Sidler Arnet

Abstract— The reliable and reproducible fabrication of nanostructures by stencil lithography faces three main challenges: the stability of the thin stencil membranes with nanoapertures, the blurring of the deposited structures, and the clogging of the nano ...

2011

We describe and demonstrate a new oscillator topology, the parametric feedback oscillator (PFO). The PFO paradigm is applicable to a wide variety of nanoscale devices and opens the possibility of new classes of oscillators employing innovative frequencydet ...

2011

Metallic Nanodot Arrays by Stencil Lithography for Plasmonic Biosensing Applications

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Oscar Vazquez Mena

The fabrication of gold nanodots by stencil lithography and its application for optical biosensing based on localized surface plasmon resonance are presented. Arrays of 50−200 nm wide nanodots with different spacing of 50−300 nm are fabricated without any ...

American Chemical Society2011

Localized Ion Implantation Through Micro/Nanostencil Masks

Jürgen Brugger, Luis Guillermo Villanueva Torrijo, Cristina Martin Olmos, Philippe Langlet, Oscar Vazquez Mena

A method is presented that allows the deﬁnition of micrometer- and submicrometer-sized implanted structures in silicon without using photoresist patterning. The process is based on the use of stencils as masks in a conventional ion implanter, and is tested ...

Institute of Electrical and Electronics Engineers2011

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We present a novel approach for hydrogen gas detection, based on palladium-coated micromechanical resonators. A sequence of thin film technniques allows the large-scale parallel fabrication of free-standing beams separated from a counter-electrode by a mes ...

IEEE2011

50 nm thick AlN film-based piezoelectric cantilevers for gravimetric detection

Luis Guillermo Villanueva Torrijo

Due to low power operation, intrinsic integrability and compatibility with CMOS processing, aluminum nitride (AlN) piezoelectric (PZE) microcantilevers are a very attractive paradigm for resonant gas sensing. In this paper, we theoretically investigate the ...

2011