Publications by Tom Larsen | EPFL Graph Search

Large Suspended Monolayer and Bilayer Graphene Membranes with Diameter up to 750 mu m

Luis Guillermo Villanueva Torrijo, Tom Larsen, Marsha Mary Parmar, Sayedeh Shirin Afyouni Akbari

In this paper ultra clean monolayer and bilayer Chemical Vapor Deposited (CVD) graphene membranes with diameters up to 500 mu m and 750 mu m, respectively have been fabricated using Inverted Floating Method (IFM) followed by thermal annealing in vacuum. Th ...

Nature Research2020

Modular interface and experimental setup for in-vacuum operation of microfluidic devices

Luis Guillermo Villanueva Torrijo, Damien Maillard, Annalisa De Pastina, Tom Larsen

We report on the design and operation of a world-to-chip microfluidic interface and experimental setup for fluidic micro- and nano-electromechanical systems. The central component of the interface is an engineered polyether ether ketone connector that brin ...

2019

Optimum ratio of hydrophobic to hydrophilic areas of biphilic surfaces in thermal fluid systems involving boiling

Luis Guillermo Villanueva Torrijo, Tom Larsen, Ahmad Reza Motezakker

Pool boiling has a high heat removal capability and is considered as one of the most effective cooling methods due to utilization of latent heat of vaporization. Surface wettability plays a key role in boiling heat transfer since it controls the contact li ...

2019

Shape memory polymer resonators as highly sensitive uncooled infrared detectors

Herbert Shea, Luis Guillermo Villanueva Torrijo, Juan José Zarate, Tom Larsen, Ulas Adiyan

Uncooled infrared detectors have enabled the rapid growth of thermal imaging applications. These detectors are predominantly bolometers, reading out a pixel’s temperature change due to infrared radiation as a resistance change. Another uncooled sensing met ...

Nature Research2019

Observation of a phononic quadrupole topological insulator

Luis Guillermo Villanueva Torrijo, Tom Larsen

2018

Position and mode dependent optical detection back-action in cantilever beam resonators

Luis Guillermo Villanueva Torrijo, Tom Larsen

Optical detection back-action in cantilever resonant or static detection presents a challenge when striving for state-of-the-art performance. The origin and possible routes for minimizing optical back-action have received little attention in literature. He ...

Institute of Physics2017

Rise time reduction of thermal actuators operated in air and water through optimized pre-shaped open-loop driving

Georg Fantner, Nahid Hosseini, Tom Larsen

Electrothermal actuators have many advantages compared to other actuators used in micro-electro-mechanical systems (MEMS). They are simple to design, easy to fabricate and provide large displacements at low voltages. Low voltages enable less stringent pass ...

2017

Piezoelectric Nanoelectromechanical Systems

Luis Guillermo Villanueva Torrijo, Annalisa De Pastina, Kaitlin Marie Howell, Andrea Lozzi, Tom Larsen, Muhammad Faizan

In this paper we describe five different transduction techniques for the motion of NEMS resonators. We describe how these techniques differ from those used for MEMS and how centrosymmetric or amorphous materials can be used to fabricate NEMS. ...

2017

Interface Losses In Multimaterial Resonators

Luis Guillermo Villanueva Torrijo, Tom Larsen

We present an extensive study shedding light on the role of surface and bulk losses in micromechanical resonators. We fabricate thin silicon nitride membranes of different sizes and we coat them with different thicknesses of metal. We later characterize th ...

Ieee2014

Cooperative video streaming with dynamic compression at the terminal nodes

Tom Larsen

Media content distribution constitutes a growing share of the services on the Internet. In recent years methods for cooperative media distribution has been a research area with high activity. Concurrently wireless internet connections have emerged. Wireles ...

IEEE Computer Society2008

Cooperative media streaming using adaptive network compression

Tom Larsen

Media content distribution constitutes a growing share of the services on the Internet. Two distinct distribution approaches used today are Layered Coding (LC) and Multiple Description Coding (MDC). Current wireless connection technologies, e.g. Wimax, hav ...

IEEE Computer Society2008

Inelastic neutron scattering experiments with the monochromatic imaging mode of the RITA-II spectrometer

Henrik Moodysson Rønnow, Tom Larsen

Recently a monochromatic multiple data taking mode has been demonstrated for diffraction experiments using a RITA type cold neutron spectrometer with a multi-bladed analyser and a position-sensitive detector. Here, we show how this mode can be used in comb ...

2006