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Martinus Gijs

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Publications associées (370)

Parylene to silicon-nitride bonding for easy post-integration of high-pressure microfluidics to CMOS devices

Martinus Gijs, Maxime Ettori, Ata Tuna Ciftlik

2011

A low-temperature parylene-to-silicon dioxide bonding technique for high-pressure microfluidics

Martinus Gijs, Ata Tuna Ciftlik

We introduce a new low-temperature (280 °C) parylene-to-SiO2 bonding process with high device yield (>90%) for the fabrication and integration of high-pressure-rated microfluidic chips. Pull tests demonstrate a parylene-to-SiO2 bonding strength of 10 ± 3 M ...

Institute of Physics2011

Exotic droplets formed in microfluidic chips with uniform wettability

Martinus Gijs, Virendra Kumar Parashar, Cédric Razaname, Josias Basil Wacker, Guillaume Louis

Microdroplets are widely used in industrial processes. In the absence of external forces, droplets generally assume a spherical shape. Here, we present two methods to form non-spherical droplets in microfluidic glass chips. A uniformly hydrophobized chip h ...

Elsevier2011

Magnetic particle dosing and size separation in a microfluidic channel

Thomas Lehnert, Martinus Gijs, Yves Moser, Rana Afshar Ghasemlouy

Separation of functional magnetic particles or magnetically labeled entities is a key feature for bioanalytical or biomedical applications and therefore also an important component of lab-on-a-chip devices for biological applications. We present a novel in ...

2011

From particles to pillars: on-chip synthesis of silica nanoparticle assemblies with controlled shape and size

Martinus Gijs, Virendra Kumar Parashar, Josias Basil Wacker

We describe the assembly of silica nanoparticles into superstructures with controlled shape and size. The individual nanoparticles are chemically linked to each other via silica bridges, thus providing high mechanical stability to the assembly. Key to cont ...

IEEE2011

Suspended SU-8 structures for monolithic microfluidic channels

Thomas Lehnert, Martinus Gijs, Sébastien Jiguet, Yves Moser, Riccardo Forti

SU-8 photoresist is commonly used in the field of microfabrication as structural material or for molding of microfluidic devices. One major limitation, however, is the difficulty to process partially freestanding SU-8 structures or monolithic closed caviti ...

Springer-Verlag2011

Low temperature pyrex/silicon wafer bonding via a single intermediate parylene layer

Martinus Gijs, Ata Tuna Ciftlik

We introduce a new low temperature (280 °C) parylene-C wafer bonding technique, where parylene-C bonds directly a Pyrex wafer to a silicon wafer with either a Si, SiO2 or Si3N4 surface with a bonding strength up to 23 MPa. The technique uses a single layer ...

IEEE2011

Lighting-up cancerous cells and tissues with lanthanide luminescence

Martinus Gijs, Jean-Claude Bünzli, Caroline Vandevyver, Anne-Sophie Chauvin, Hans-Anton Lehr

2011

Three-Dimensional Magnetic Focusing of Superparamagnetic Beads for On-Chip Agglutination Assays

Thomas Lehnert, Martinus Gijs, Yves Moser, Rana Afshar Ghasemlouy

We present a new method for three-dimensional (3D) magnetic focusing of magnetic microparticles in a microfluidic system. On-chip magnetic particle manipulation in themicrochannel is achieved by a high-gradientmagnetic field generated by means of a microma ...

2011

Modal analysis and modeling of a frictionless electrostatic rotary stepper micromotor

Christophe Yamahata, Martinus Gijs, Marc Stranczl

We present the design, modeling and characterization of a 3-phase electrostatic rotary stepper micromotor. The proposed motor is a monolithic device fabricated using silicon-on-insulator (SOI) technology. The rotor is suspended with a frictionless flexural ...

IEEE2011

Planar micro-direct methanol fuel cell prototyped by rapid powder blasting

Martinus Gijs, Ludovic Dovat, Meng Shen

We present a planar micro-direct methanol fuel cell (μ−DMFC) fabricated by rapid prototyping powder blasting technology. Using an elastomeric mask, we pattern two parallel microfluidic channels in glass. The anode and cathode of the fuel cell are formed by ...

Elsevier2011

Subpixel translation of MEMS measured by discrete Fourier transform analysis of CCD images

Christophe Yamahata, Martinus Gijs, Marc Stranczl

We present a straightforward method for measuring in-plane linear displacements of microelectromechanical systems (MEMS) with a subnanometer resolution. The technique is based on Fourier transform analysis of a video recorded with a Charge-Coupled Device ( ...

2011

Microchannel-guided capture antibody patterning on beads for multiple protein detection arrays

Martinus Gijs, Venkataragavalu Sivagnanam, Hüseyin Cumhur Tekin, Sébastien Vaneberg

We present the rapid fabrication of custom protein micro-arrays, in less than 35 minutes, on the surface of immobilized beads using microchannel-guided flows driven by a single syringe pump. The commercially available beads provide robust micro-array surfa ...

2011

Nutrichip: an integrated microfluidic system for in vitro investigation of the immunemodulatory function of dairy products

Martinus Gijs, Paolo Silacci, Guy Vergères, Sandro Carrara, Flurina Schwander, Hamideh Jafarpoorchekab

We introduce the concept of the NutriChip, a miniaturized artificial human gastrointestinal tract (GIT) for investigating the potential of immuno-modulatory function of dairy food. More specifically, we are investigating the effect of digested milk on immu ...

2011

Microfluidic device for analysis of protein biomarkers using magnetic bead surface coverage detection

Martinus Gijs, Hüseyin Cumhur Tekin, Cynthia Scherz

We present a microfluidic device for on-chip analysis of low-concentration protein biomarkers. A new detection method, based on the magnetic capture of proteins via superparamagnetic beads and counting the surface coverage of the latter is presented. The p ...

2011

Polyimide foam-like microstructures: technology and mechanical properties

Philippe Renaud, Martinus Gijs, Sébastien Jiguet, Pierre Joris, Jagoda Anna Dobrzynska

We report a process for the realization of polyimide films with custom-designed microporosity based on the heat-induced depolymerization of polyimide-embedded polypropylene carbonate microstructures. The foam-like microstructures are up to 40 µm thick and ...

Institute of Physics2011

Simultaneous sample washing and concentration using a “trapping-and-releasing” mechanism of magnetic beads on a microfluidic chip

Martinus Gijs

Simultaneous washing and concentration of functionalized magnetic beads in a complex sample solution was demonstrated by applying a rotational magnetic actuation system to a microfluidic chip under continuous flow conditions. The rotation of periodically a ...

2011

Magnetic active-valve micropump actuated by a rotating magnetic assembly

Martinus Gijs, Meng Shen

We report on a high-efficiency and self-priming active-valve micropump consisting of a microfluidic chamber structure in glass that is assembled with a polydimethylsiloxane (PDMS) elastic sheet. The latter comprises two valving membranes and a central pump ...

Elsevier2011

Chaotic mixing using source-sink microfluidic flows in a PDMS chip

Abdeljalil Sayah, Martinus Gijs, Caroline Vandevyver, Venkataragavalu Sivagnanam, Hüseyin Cumhur Tekin, Ata Tuna Ciftlik

We present an active fixed-volume mixer based on the creation of multiple source–sink microfluidic flows in a polydimethylsiloxane (PDMS) chip without the need of external or internal pumps. To do so, four different pressure-controlled actuation chambers a ...

Springer-Verlag2011

High-Performance Protein Preconcentrator Using Microchannel-Integrated Nafion Strip

Martinus Gijs, Venkataragavalu Sivagnanam, Meng Shen, Hui Yang

A microfluidic device for protein preconcentration based on the electrokinetic trapping principle is proposed. It comprises a Nafion strip which is simply cut from a commercially available membrane and integrated into a polydimethylsiloxane (PDMS) microflu ...

IEEE2011

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