Publications associées à Seeing Big with Scanning Electrochemical Microscopy

Polysulfone Dispersed Liquid Crystals As Promising Materials For Flexible Substrates Of Organic Light Emitting Diodes

The paper deals with the preparation and investigation of a series of polymer dispersed liquid crystals (PDLCs) based on polysulfone matrix and an azomethine liquid crystal. The PDLC systems were prepared by thermal induced phase separation method. Their m ...

UNIV POLITEHNICA BUCHAREST, SCI BULL2021

Evaluation of materials for iodine and technetium immobilization through sorption and redox-driven processes

Daniel Teav Sun, Wendy Lee Queen

Radioactive iodine-129 (I-129) and technetium-99 (Tc-9(9)) pose a risk to groundwater due to their long half-lives, toxicity, and high environmental mobility. Based on literature reviewed in Moore et al. (2019) and Pearce et aL (2019), natural and engineer ...

ELSEVIER2020

Nanoscale Selective Passivation of Electrodes Contacting a 2D Semiconductor

Aleksandra Radenovic, Michael Graf, Martina Lihter

2D semiconducting materials have become the central component of various nanoelectronic devices and sensors. For sensors operating in liquid, it is crucial to efficiently block the electron transfer that occurs between the electrodes contacting the 2D mate ...

2019

A novel microfabrication platform for hybrid multilayer MEMS

Nahid Hosseini

In Atomic force microscopy (AFM), the tip-sample interaction force can be measured through two primary detection techniques: optical beam detection (OBD) and electrical (self-sensing) readout. Compared to the optical method, the convenience of the self-sen ...

EPFL2019

Structure and functionality of polyelectrolyte brushes, a surface force perspective

Harm-Anton Klok, Xingyu Xu, Mark Billing, Jing Yu

The unique functionalities of polyelectrolyte brushes depend on several types of specific interactions, including solvent structure effects, hydrophobic forces, electrostatic interactions, and specific ion interactions. Subtle variations in the solution en ...

2018

Local electronic properties and adsorption conformations of molecular nanostructures at surfaces

Ivan Pentegov

Nanoscale science is an emerging field of our time and opens a broad horizon for applications in almost every area of human activity, from medicine to energy storage. As usual, there are numerous challenges in the way of progress, which slow down the devel ...

EPFL2015

Programming Hierarchical Supramolecular Nanostructures by Molecular Design

Klaus Kern, Magalí Alejandra Lingenfelder, Giovanni Costantini

Supramolecular nanostructures with tunable dimensionalities are fabricated by deposition of benzene carboxylic acids on the Cu(110) surface. By tailoring the number and position of the functional moieties, the structure of the final molecular assemblies ca ...

Amer Chemical Soc2013

Electrospray Ion Beam Deposition of Complex Non-Volatile Molecules

Gordon Rinke

The rational synthesis of novel materials requires the control over the arrangement of matter in order to meet the desired properties for applications and devices. Ultimately, control means to define the place of each atom and determine its chemical state, ...

EPFL2013

Controlling a Single DNA Molecule in an Electric Field by Means of In Situ Atomic Force Microscopy

Giovanni Dietler, Jae Sun Jeong

DNA is the bio-polymer containing the genetic information needed for the development and functioning for all living organisms. It has a polymeric structure consisting of units called nucleotides, each consisting of a non-polar, hydrophobic interior (the ba ...

Electrochemical Society2012

Microfluidic Push-Pull Probe for Scanning Electrochemical Microscopy

Hubert Girault, Gunther Wittstock, Fernando Cortes Salazar, Dmitry Momotenko, Andreas Stephan Lesch

This paper presents a microfluidic push-pull probe for scanning electrochemical microscopy (SECM) consisting of a working microelectrode, an integrated counter/reference electrode and two microchannels for pushing and pulling an electrolyte solution to and ...

2011

Terephthalic acid adsorption on Si(111)-(root 3x root 3)-Bi surfaces: Effect of Bi coverage

Klaus Kern, Theresa Lutz, Giovanni Costantini

The influence of the density of metallic atoms on the formation of supramolecular structures onto Si surface alloys is investigated by scanning tunneling microscopy. Terephthalic acid (TPA) adsorption experiments are performed on the Si(111) alpha- and bet ...

2011

Nanostructured Functional Particles and Surfaces

Arthur Olivier Joseph Ganz

Topographic nanostructuring of surfaces is a promising concept, in particular to improve the bio-integration of titanium orthopedic implants. In this context, a new method for the nanostructuring of anodised titanium surfaces was developed. Ordered topogra ...

EPFL2010

Soft Stylus Probes for Scanning Electrochemical Microscopy

Hubert Girault, Anne-Laure Gassner, Mohamad Hojeij, Gunther Wittstock, Fernando Cortes Salazar

A soft stylus microelectrode probe has been developed to carry out scanning electrochemical microscopy (SECM) of rough, tilted, and large substrates in contact mode. It is fabricated by first ablating a microchannel in a polyethylene terephthalate thin fil ...

2009

Nanohydroxyapatite/poly(ester urethane) scaffold for bone tissue engineering

Pierre-Etienne Bourban, Carole Boissard

Biodegradable viscoelastic poly(ester urethane)-based scaffolds show great promise for tissue engineering. In this study, the preparation of hydroxyapatite nanoparticles (nHA)/poly(ester urethane) composite scaffolds using a salt-leaching-phase inverse pro ...

Elsevier2009

Inkjet printing and high aspect ratio structuring for polymer-based micro and nano systems

Vahid Fakhfouri

Inkjet printing of functional materials, photolithography and micromolding are 3 different techniques largely used in the field of micro-electromechanical systems (MEMS) with increasing interest for the fabrication of new devices and the development of new ...

EPFL2008

Detection of proteins on membranes and in microchannels using copper staining combined with Scanning Electrochemical Microscopy

Hubert Girault, Niels Erik Lion

Scanning Electrochemical Microscopy (SECM) and copper staining are combined to achieve visualisation of proteins on surfaces. Proteins are adsorbed on a polyvinylidene fluoride (PVDF) membrane or on a polyethylene terephthalate (PET) surface and stained us ...

2007

Coexistence of one- and two-dimensional supramolecular assemblies of terephthalic acid on Pd(111) due to self-limiting deprotonation

Harald Brune, Klaus Kern, Sylvain Clair, Marta Canas Ventura

The adsorption of terephthalic acid [C6H4(COOH)(2), TPA] on a Pd(111) surface has been investigated by means of scanning tunneling microscopy (STM), x-ray photoelectron spectroscopy, and near-edge x-ray absorption fine structure spectroscopy under ultrahig ...

2006

Electronic and optical properties of supported C60 molecules studied by scanning tunneling microscopy

Elizabeta Cavar

This thesis is primarily concerned with optical properties of adsorbed C60 molecules on metal and insulating substrates. These properties were studied on a single-molecule scale, using Scanning Tunneling Microscope-induced light emission spectroscopy (STM- ...

EPFL2005

Self-organized growth of ordered functional nanostructures on templates

In this thesis, the use of nanotemplates for steering the molecular self-organization at metallic surfaces is investigated. Nanotemplates are surfaces that exhibit a periodic variation of the adhesion energy on the nanometer scale. Preferential adsorption ...

EPFL2005