Open Access Published by De Gruyter Open Access

Volume 2 Issue 1

January 2015

Issue of Nanofabrication

Contents
Journal Overview

Open Access February 18, 2015

Transport characteristics of focused beam deposited nanostructures

Ana Ballestar, Pablo Esquinazi

More Download PDF

Abstract

We review the transport properties of different nanostructures produced by ion- and electron-beam deposition, as prepared as well as after certain treatments. In general, the available literature indicates that the transport properties are determined by conduction processes typical for disordered metallic grains embedded in a carbon-rich matrix, including intergrain tunneling and variable range hopping mechanisms. Special emphasis is given to the superconducting behavior found in certain Tungsten-Carbide nanostructures that, in a certain field and temperature range, is compatible with that of granular superconductivity. This granular superconductivity leads to phenomena like magnetic field oscillations as well as anomalous hysteresis loops in the magnetoresistance.

Open Access May 6, 2015

Patterning of Quantum Dots by Dip-Pen and Polymer Pen Nanolithography

Soma Biswas, Falko Brinkmann, Michael Hirtz, Harald Fuchs

More Download PDF

Abstract

We present a direct way of patterning CdSe/ ZnS quantum dots by dip-pen nanolithography and polymer pen lithography. Mixtures of cholesterol and phospholipid 1,2-dioleoyl-sn-glycero-3 phosphocholine serve as biocompatible carrier inks to facilitate the transfer of quantum dots from the tips to the surface during lithography. While dip-pen nanolithography of quantum dots can be used to achieve higher resolution and smaller pattern features (approximately 1 μm), polymer pen lithography is able to address intermediate pattern scales in the low micrometre range. This allows us to combine the advantages of micro contact printing in large area and massive parallel patterning, with the added flexibility in pattern design inherent in the DPN technique.

Open Access May 8, 2015

Lipid nanotube networks: Biomimetic Cell-to-Cell Communication and Soft-Matter Technology

Irep Gözen, Aldo Jesorka

Download PDF

Open Access July 24, 2015

Evaporative edge lithography of a liposomal drug microarray for cell migration assays

Nicholas Vafai, Troy W. Lowry, Korey A. Wilson, Michael W. Davidson, Steven Lenhert

More Download PDF

Abstract

Abstract: Lipid multilayer microarrays are a promising approach to miniaturize laboratory procedures by taking advantage of the microscopic compartmentalization capabilities of lipids. Here, we demonstrate a new method to pattern lipid multilayers on surfaces based on solvent evaporation along the edge where a stencil contacts a surface called evaporative edge lithography (EEL). As an example of an application of this process, we use EEL to make microarrays suitable for a cell-based migration assay. Currently existing cell migration assays require a separate compartment for each drug which is dissolved at a single concentration in solution. An advantage of the lipid multilayer microarray assay is that multiple compounds can be tested on the same surface. We demonstrate this by testing the effect of two different lipophilic drugs, Taxol and Brefeldin A, on collective cell migration into an unpopulated area. This particular assay should be scalable to test of 2000 different lipophilic compounds or dosages on a standard microtiter plate area, or if adapted for individual cell migration, it would allow for high-throughput screening of more than 50,000 compounds per plate.

Open Access February 5, 2016

Ink transport modelling in Dip-Pen Nanolithography and Polymer Pen Lithography

Ainhoa Urtizberea, Michael Hirtz, Harald Fuchs

More Download PDF

Abstract

Dip-pen nanolithography (DPN) and Polymer pen lithography (PPL) are powerful lithography techniques being able to pattern a wide range of inks. Transport and surface spreading depend on the ink physicochemical properties, defining its diffusive and fluid character. Structure assembly on surface arises from a balance between the entanglement of the ink itself and the interaction with the substrate. According to the transport characteristics, different models have been proposed. In this article we review the common types of inks employed for patterning, the particular physicochemical characteristics that make them flow following different dynamics as well as the corresponding transport mechanisms and models that describe them.

Open Access February 25, 2016

Nano-proximity direct ion beam writing

Gediminas Seniutinas, Gediminas Gervinskas, Jose Anguita, Davit Hakobyan, Etienne Brasselet, Saulius Juodkazis

More Download PDF

Abstract

Focused ion beam (FIB) milling with a 10 nm resolution is used to directly write metallic metasurfaces and micro-optical elements capable to create structured light fields. Surface density of fabricated nano-features, their edge steepness as well as ion implantation extension around the cut line depend on the ion beam intensity profile. The FIB beam intensity cross section was evaluated using atomic force microscopy (AFM) scans of milled line arrays on a thin Pt film. Approximation of two Gaussian intensity distributions describes the actual beam profile composed of central high intensity part and peripheral wings. FIB fabrication reaching aspect ratio of 10 in gold film is demonstrated.

About this journal

Starting from 2022, the journal is no longer published by De Gruyter. The new journal website is accessible at: https://eaapublishing.org/journals/index.php/nanofab/index. Also, the new submissions can be sent to editorial@eaapublishing.org.

Nanofabrication published multi- and interdisciplinary works from researchers in the broad field of micro- to nanostructuring and device fabrication. Scientist interested in the advances on micro- and nanoscale patterning methods and the application of structures generated by these in applied physics, biomedical and life sciences are the target audience of the journal.