Publications by Peter Van der Wal

Newly designed gel-integrated nanostructured gold-based interconnected microelectrode arrays for continuous in situ arsenite monitoring in aquatic systems

This work presents the development, characterization and field validation of newly designed gel-integrated nanostructured gold-basedmicroelectrode arrays (Au-GIMEs) enabling the direct detection of inorganic arsenite (As(III)) in fresh and marine aquatic s ...

ELSEVIER SCIENCE SA2021

In Situ Voltammetric Sensor of Potentially Bioavailable Inorganic Mercury in Marine Aquatic Systems Based on Gel-Integrated Nanostructured Gold-Based Microelectrode Arrays

Peter Van der Wal, Marianna Fighera

The development and field validation of newly designed nanostructured gold-plated gel-integrated microelectrode (Au-GIME) arrays applied to the direct in situ square wave anodic stripping voltammetry (SWASV) quantification of the potentially bioavailable i ...

AMER CHEMICAL SOC2021

Advanced multichannel submersible probe for autonomous high-resolution in situ monitoring of the cycling of the potentially bioavailable fraction of a range of trace metals

Peter Van der Wal, Marianna Fighera

We report here on the development and application of a submersible, compact, low power consumption, integrated multichannel trace metal sensing probe (TracMetal). This probe is unique in that it allows high-resolution, simultaneous in-situ measurements of ...

Pergamon-Elsevier Science Ltd2021

3D-Integration Of Printed Electrochemical Sensors In Pet Microfluidics For Biochemical Sensing

Danick Briand, Peter Van der Wal, Angélique Martine Bionaz, Marc Olivier Joho, Silvia Demuru

This paper presents a novel process for screen printed electrode fabrication, functionalization and integration in a polyethylene terephthalate (PET) fluidics system for electrochemical analysis. The innovative components utilized are: 1. 3D Through-Foil V ...

IEEE2019

Microfluidic Platform for Seawater Desalination by Coulometric Removal of Chloride Ions through Printed Ag Electrodes

Herbert Shea, Peter Van der Wal, Marianna Fighera

This paper reports on the electrochemical characterization and comparison of printable silver inks for the fabrication of planar electrodes to integrate in a microfluidic platform for in situ desalination of seawater prior to detection of nutrients in mari ...

Electrochemical Soc Inc2017

In-plane fabrication of insulated gold-tip probes for electrochemical and force spectroscopy molecular experiments

Nico de Rooij, Terunobu Akiyama, Sebastian Gautsch, Peter Van der Wal, Yexian Wu

A new and versatile fabrication process of insulated gold tip probes for atomic force microscopy (AFM) is presented by Wu et al. (In-plane fabricated insulated gold-tip probe for electrochemical and molecular experiments, in: 2013 IEEE 26th International C ...

Elsevier2014

Multisite monitoring of choline using biosensor microprobe arrays in combination with CMOS circuitry

Nico de Rooij, Olivier Frey, Peter Van der Wal

A miniature device enabling parallel in vivo detection of the neurotransmitter choline in multiple brain regions of freely behaving rodents is presented. This is achieved by combining a biosensor microprobe array with a custom-developed CMOS chip. Each sil ...

De Gruyter2014

In-Plane Fabricated Insulated Gold-Tip Probe For Electrochemical And Molecular Experiments

Nico de Rooij, Terunobu Akiyama, Sebastian Gautsch, Peter Van der Wal, Yexian Wu

In this contribution we present a scanning probe with a gold-tip completely encapsulated with insulator all the way to the apex. The probe fabrication is unique owing to an in-plane arrangement in which the width of the cantilever is defined by deep reacti ...

IEEE2013

Droplet-based Liquid-Liquid Extraction and On-Chip IR-Waveguide-Spectroscopy Detection of Cocaine in Human Saliva

Nico de Rooij, Hans Peter Herzig, Yu-Chi Chang, Peter Van der Wal, Philip Wägli, Lubos Hvozdara

We present a portable microsystem to quantitatively detect cocaine in human saliva. The chip combines a simple microfluidic method for multiphase liquid-liquid extraction to transfer cocaine from IR-light absorbing saliva to an IRtransparent solvent with t ...

2012

Biosensor Microprobe Functionalisation Using an On-Chip Dispensing Approach

Nico de Rooij, Olivier Frey, Peter Van der Wal

Silicon biosensor microprobes for the in vivo detection of neurotransmitters are equipped with removable clips for an on-chip functionalisation technique that allows a simple and comfortable but very local and reproducible deposition of sensitive layers on ...

Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa2009

Simultaneous Chemical Recording and Stimulation in the Brain Using an Assembly of Biosensor Silicon Microprobes and SU-8 Microinjectors

Nico de Rooij, Olivier Frey, Peter Van der Wal

In this contribution we present multi-channel microinjector arrays fabricated by a reliable three-layer SU-8 process and assembled with glutamate biosensor microprobes'. It enables local delivery of specific liquids into brain tissue for the stimulation or ...

Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa2009

Hybrid microfluidic cartridge formed by irreversible bonding of SU-8 and PDMS for multi-layer flow applications

Nico de Rooij, Sara Talaei, Olivier Frey, Peter Van der Wal

SU-8 and polydimethylsiloxane (PDMS) are both transparent materials with properties very convenient for rapid prototyping of microfluidic systems. However, previous efforts of combining these two materials failed due to poor adhesion between them. Herein, ...

Elsevier Science, Reg Sales Off, Customer Support Dept, 655 Ave Of The Americas, New York, Ny 10010 Usa2009