31 documents found

Article / Chapter
CC BY-NC 3.0
2020-05-29

Novel SERS-based process analysis for label-free segmented flow screenings

In microfluidic segmented flow processes label-free analytical techniques like surface enhanced Raman spectroscopy (SERS) can reveal the chemical composition of the individual droplet contents. The SERS system developed in this work enables a simple connection to micro segmented flow processes through...
Cambridge: RSC, 2020-05-29
Article / Chapter
CC BY 4.0
2020-04-10

Microfluidic chamber design for controlled droplet expansion and coalescence

The defined formation and expansion of droplets are essential operations for droplet-based screening assays. The volumetric expansion of droplets causes a dilution of the ingredients. Dilution is required for the generation of concentration graduation which is mandatory for many different assay protocols....
Basel: MDPI, 2020-04-10
Article / Chapter
CC BY 4.0
2020-02-08

Microfluidically prepared sensor particles for determination of chloride...

Polyacrylamide sensor particles have been synthesized by using a microfluidic arrangement for generation of microdroplets containing a reaction mixture for forming gel microparticles. The droplets are formed in an inert carrier liquid immiscible with the reaction mixture based on aqueous solutions. Gel...
[Cham]: Springer International Publishing, 2020-02-08
Article / Chapter
CC BY 4.0
2019-11-27

Preparation and deep characterization of composite/hybrid multi-scale and...

Polymeric microparticles were produced following a three-step procedure involving (i) the production of an aqueous nanoemulsion of tri and monofunctional acrylate-based monomers droplets by an elongational-flow microemulsifier, (ii) the production of a nanosuspension upon the continuous-flow UV-initiated...
Basel: MDPI, 2019-11-27
Article / Chapter
CC BY-NC 4.0
2019-10-10

Metal nano networks by potential-controlled in situ assembling of gold/silver...

Non‐spherical Au/Ag nanoparticles can be generated by chemical reduction of silver ions in the presence of preformed gold nanoparticles. The process of particle formation can be controlled by concentrations of ligands and reducing agent. The formation of ellipsoidal, nanorod‐ and peanut‐shaped nanoparticles...
Weinheim: Wiley-VCH-Verl., 2019-10-10
Book
All rights reserved
2019-09-12

Entropie-Wende

Dissertation
All rights reserved
2019-07-02

Plasmonisch aktive Schichten und Nanostrukturen für die Material- und Sensorentwicklung

Der Schwerpunkt der Arbeit liegt in der Evaluierung neuer Materialkombinationen und kostengünstiger Herstellungstechnologien für die Realisierung definierter, spezieller optischer Eigenschaften von Oberflächen, Nanopartikeln (NP) und -strukturen auf Basis von Schichttechnologien, insbesondere in Hinblick...
Dissertation
All rights reserved
2019-06-13

Development and evaluation of a process to isolate picolitre compartments...

Verglichen mit etablierten industriellen Hochdurchsatz-Anlagen entwickelten sich mikrofluidische, emulsionsbasierte Tropfensysteme in den letzten Jahren zu einer günstigen Alternative. Jedoch ist es derzeit nicht möglich, einzelne Tropfen im Pikoliter-Volumenbereich aus einer Vielzahl anderer Proben...
Article / Chapter
CC BY 4.0
2018-08-10

The mixed-electrode concept for understanding growth and aggregation...

The growth and aggregation behavior of metal nanoparticles can be modulated by surfactants and different other additives. Here the concept of how open-circuit mixed electrodes helps to understand the electrical aspects of nanoparticle growth and the consequences for the particle geometries is discussed....
Basel: MDPI, 2018-08-10
Dissertation
All rights reserved
2018-05-02

Design of metal oxide-based electrodes for efficient photoelectrochemical...

In Anbetracht der Nachteile konventioneller Photokathoden und Photoanodenmaterialien, fokussieren wir uns auf die Erschließung neuer Kandidaten für hocheffiziente photoelektrochemische Systeme (PEC). Diese Dissertation befasst sich mit der Erforschung von Oxidhalbleitern hergestellt durch Elektrodeposition...
Dissertation
All rights reserved
2017-07-04

Role of coupling conditions for pattern formation in excitable media

Diese Arbeit beschäftigt sich mit dem Übergang zwischen regulären und irregulären Mustern in Reaktions-Diffusions (RD)-Systemen. Hierbei lag der Fokus der Untersuchung auf der Rolle der Kopplungsbedingungen zwischen mehreren Oszillatoren für das Auftreten des Übergangs und der Systemspezifität der zugrundeliegenden...
Dissertation
All rights reserved
2016-10-12

Large area of ultrathin alumina membranes toward innovative heterogeneous...

Ordered nanostructure arrays are attracting intensive scientific attention because of their many and varied applications. However, it is still a challenge to achieve ordered nanostructure patterning over a relatively large area (for instance on the wafer scale) by a technique that will allow high throughput,...
Dissertation
2015-12-09

Microfluidic Synthesis and Assembly of Multi-Scale Polymer Composite Particles...

Polymer Nano- und Mikropartikel unterschiedlicher Größe, Form und Zusammensetzung sind in verschiedenen Bereichen wie Biomedizin und Nanotechnologie von großem Interesse. Eine der größten Herausforderungen bei der Synthese von Mehrkomponentenpartikeln sind die Reproduzierbarkeit und Monodispersität...
Article / Chapter
2015-05-27

Nanometer precise adjustment of the silver shell thickness during automated...

In this work, a wet-chemical synthesis method for gold–silver core–shell particles with nanometer precise adjustable silver shell thicknesses is presented. Typically wet-chemical syntheses lead to relatively large diameter size distributions and losses in the yield of the desired particle structure due...
Article / Chapter
2015-05-27

Micro-segmented flow and multisensor-technology for microbial activity...

The combination of micro-segmented flow with miniaturized flow-through multisensor-technology has been utilized for metabolite profiling of soil bacteria. Series of sub-μl segments were generated containing soil sample slurry from historic copper mining sites and exposed to heavy metal salts of copper...
Dissertation
2015-01-28

Einstellung der physikalischen Eigenschaften von zusammengesetzten oder...

The subject of this work was the development of a microfluidic multistep process for the synthesis of noble metal nanoparticle systems. The underlying question of the experimental studies demanded a statement about the advantages of the selected microfluidic synthesis strategy to the ensemble properties...
Dissertation
2014-09-16

Herstellung und Charakterisierung neuartiger Hybridnanostrukturen für bioanalytische...

The impact of nanotechnology in various aspects of the daily life is continually increasing, especially as more applications for nanostructures are being discovered. Nanostructures provide a high functionality within the smallest of areas, which makes them interesting for many applications in the...
Dissertation
2014-03-21

Strömungsphänomene der tropfenbasierten Mikrofluidik

The utilization of liquid/liquid two-phase flows in highly integrated Lab-on-a-chip systems opens up fascinating perspectives for the implementation of high-throughput applications with respect to sensitivity, performance, and cost savings. Droplet-based assays, where each sample droplet is created,...
Article / Chapter
OA NLZ
2013-11-21

Investigation of mixture toxicity of widely used drugs caffeine and ampicillin...

Droplet-based microfluidic technique is very suitable for a variety of screening processes. The cultivation within nanoliter segments and multidimensional microtoxicological screening of the Gram-negative bacterium Escherichia coli were studied under droplet-based bicrofluidic conditions. In order to...
Berlin: De Gruyter, 2013-11-21