Publications by Raphaël Pugin

Transparent and Robust Silica Coatings with Dual Range Porosity for Enzyme-Based Optical Biosensing

Bernard Wenger, Heinrich Hofmann, Raphaël Pugin, Oswaldo Javier Pérez Anguiano, Emmanuel Scolan

Hierarchically porous transparent silica coatings combine large specific surface area with enhanced pore accessibility for optical biosensing. This paper describes a versatile approach to fabricate optically transparent silica coatings with multiscale poro ...

Wiley-Blackwell2017

Controlling Mesopore Size and Processability of Transparent Enzyme-Loaded Silica Films for Biosensing Applications

Bernard Wenger, Heinrich Hofmann, Raphaël Pugin, Oswaldo Javier Pérez Anguiano, Emmanuel Scolan

Silica-based nanoporous thin films including large mesopores are relevant as enzyme supports for applications in biosensing. The diffusion and immobilization of large biomolecules such as enzymes in such porous films require the presence of large mesopores ...

Amer Chemical Soc2015

Fabrication of thermo-responsive nano-valve by grafting-to in melt of poly(N-isopropylacrylamide) onto nanoporous silicon nitride membranes

Philippe Renaud, Raphaël Pugin, Franck Montagne, Alexandre Zenon Ivan Bojko

This article reports the grafting-to in melt of amino and carboxy-terminated poly(N-isopropylacrylamide) (PNIPAM) onto ultrathin nanoporous silicon nitride membranes (NSiNMs) with a mean pore size of 85 +/- 15 nm functionalized respectively with a self-ass ...

Elsevier2014

Self-Patterned Nanoparticle Layers for Vertical Interconnects: Application in Tandem Solar Cells

Christophe Ballif, Aïcha Hessler-Wyser, Fanny Sculati-Meillaud, Nicolas Blondiaux, Raphaël Pugin, Franz-Josef Haug, Mathieu Gérard Boccard, Michael Elias Stückelberger, Emmanuel Scolan, Björn Niesen

We demonstrate self-patterned insulating nanoparticle layers to define local electrical interconnects in thin-film electronic devices. We show this with thin-film silicon tandem solar cells, where we introduce between the two component cells a solution-pro ...

American Chemical Society2014

Hierarchical positioning of gold nanoparticles into periodic arrays using block copolymer nanoring templates

Patrik Willi Hoffmann, Harry Heinzelmann, Raphaël Pugin, Li Wang, Franck Montagne

We report a simple and versatile self-assembly method for controlling the placement of functional gold nanoparticles on silicon substrates using micellar templates. The hierarchical positioning of gold nanoparticles is achieved in one-step during the spont ...

2011

SiN membranes with submicrometer hole arrays patterned by wafer-scale nanosphere lithography

Jürgen Brugger, Nicolas Blondiaux, Harry Heinzelmann, Oscar Vazquez Mena, Andreea Veronica Savu, Mona Julia Katharina Klein, Raphaël Pugin, Franck Montagne

In this work, nanosphere lithography was integrated with standard microfabrication for the wafer-scale fabrication of silicon nitride (SiN) membranes with arrays of submicrometer holes. A monolayer of polystyrene (PS) beads with a mean diameter of 428 or 5 ...

2011

GOLD MEMBRANES WITH LARGE ARRAYS OF SUB-µm HOLES FABRICATED BY WAFER-SCALE NANOSPHERE LITHOGRAPHY

Jürgen Brugger, Harry Heinzelmann, Mona Julia Katharina Klein, Raphaël Pugin

Gold membranes with large arrays of sub-µm holes were fabricated and optically characterized. The fabrication is a combination of a bottom-up, self-assembly based patterning technique, Nanosphere Lithography (NSL), and standard microfabrication. This was a ...

2011

Solid-state nanopore array membranes patterned by electron beam lithography, nanosphere lithography and aluminum anodization

Jürgen Brugger, Nicolas Blondiaux, Harry Heinzelmann, Oscar Vazquez Mena, Andreea Veronica Savu, Mona Julia Katharina Klein, Raphaël Pugin, Franck Montagne, Vaida Auzelyte, Songmei Wu

We present the fabrication of thin membranes with dense arrays of nanometer and submicrometer pore arrays by the integration of standard micromachining with three pore patterning techniques: electron beam lithography (EBL), nanosphere lithography (NSL) and ...

2011

Inexpensive and fast wafer-scale fabrication of nanohole arrays in thin gold ﬁlms for plasmonics

Bernard Wenger, Jürgen Brugger, Harry Heinzelmann, Mona Julia Katharina Klein, Raphaël Pugin

In this paper, a fast and inexpensive wafer-scale process for the fabrication of arrays of nanoscale holes in thin gold ﬁlms for plasmonics is shown. The process combines nanosphere lithography using spin-coated polystyrene beads with a sputter-etching pro ...

Institute of Physics2010

Nanoporous SiN membranes patterned by wafer-scale nanosphere lithography

Jürgen Brugger, Harry Heinzelmann, Oscar Vazquez Mena, Andreea Veronica Savu, Mona Julia Katharina Klein, Raphaël Pugin, Franck Montagne

Nanoporous SiN membranes are interesting for a number of applications, e.g. stenciling, filtration, or tissue engineering [1-3]. The patterning of the pores requires a high resolution lithographic tool. Focused ion beam milling or e-beam lithography fulfil ...

2010

Fabrication of nanopore arrays and ultrathin silicon nitride membranes by block-copolymer-assisted lithography

Jeffrey Alan Hubbell, Harry Heinzelmann, Ana Maria Popa, Raphaël Pugin

Here we show a method for patterning a thin metal film using self-assembled block-copolymer micelles monolayers as a template. The obtained metallic mask is transferred by reactive ion etching in silicon oxide, silicon and silicon nitride substrates, thus ...

2009

Surface Nanopatterning by Polymer Self-Assembly: from Applied Research to Industrial Applications

Martha Liley, Jeffrey Alan Hubbell, Nicolas Blondiaux, Ana Maria Popa, Raphaël Pugin

Complementary methods have been developed for surface nanostructuring using molecular self-assembly, reactive ion etching and replication techniques. First, controlled surface nanostructures with tunable lateral dimensions from tens of nanometer to tens of ...

2009

Gold nanoring arrays from responsive block copolymer templates

Patrik Willi Hoffmann, Raphaël Pugin, Li Wang, Franck Montagne

We report a pH-mediated synthetic route for the production of ordered and size-tuneable arrays of gold nanorings using responsive block copolymer micelles as templates. ...

Royal Society of Chemistry2009

The systematic tunability of nanoparticle dimensions through the controlled loading of surface-deposited diblock copolymer micelles

Jürgen Brugger, Harry Heinzelmann, Sivashankar Krishnamoorthy, Raphaël Pugin

The continuous tunability of iron oxide nanoparticle dimensions is demonstrated using the pH controlled loading of ferric nitrate from aqueous solution into polystyrene–block–polyacrylic acid reverse micelles deposited on a silicon substrate. Quasi-hexagon ...

2008

Nanopatterned Self-Assembled Monolayers by Using Diblock Copolymer Micelles as Nanometer-Scale Adsorption and Etch Masks

Jürgen Brugger, Harry Heinzelmann, Sivashankar Krishnamoorthy, Raphaël Pugin

Wiley2008

Tuning the Dimensions and Periodicities of Nanostructures Starting from the Same Polystyrene-block-poly(2-vinylpyridine) Diblock Copolymer

Jürgen Brugger, Harry Heinzelmann, Sivashankar Krishnamoorthy, Raphaël Pugin

The controlled tuning of the characteristic dimensions of two-dimensional arrays of block-copolymer reverse micelles deposited on silicon surfaces is demonstrated. The polymer used is polystyrene-block-poly(2-vinylpyridine) (91500-b-105000 g mol–1). Revers ...

2006

Block copolymer micelles as switchable templates for nanofabrication

Jürgen Brugger, Harry Heinzelmann, Sivashankar Krishnamoorthy, Raphaël Pugin

Block copolymer inverse micelles from polystyrene-block-poly-2-vinylpyridine (PS-b-P2VP) deposited as monolayer films onto surfaces show responsive behavior and are reversibly switchable between two states of different topography and surface chemistry. The ...

2006