Thomas Krinke

• Dr.-Ing.
• PostDoc Position at Lund University

Characterization of five Differential Mobility Analyzers to Optimize the Yield for Nanoparticle Production We present an experimental study that compares the transfer function of five different DMAs with the aim to provide a decision matrix that helps to choose the right DMA and the right settings to get the optimal yield for a requested set of ae...

In aerosol science, there is an increasing interest to perform mobile measurements to obtain number size distribution of ultrafine particles (UFP), using portable instruments based on unipolar charging and size segregation by electrical particle mobility. Applications of such measurements range from ambient and indoor aerosol studies to source iden...

Indoor particulate matter (PM) emissions generated by two of the main indoor activities which are cooking and heating using electrical devices were investigated. The total number concentration and the size distributions were measured and the impact of the technology design of the electrical appliances on the indoor PM emission was emphasized. The r...

Air quality inside a residential apartment has been investigated by measuring the PM emission generated from cooking and ironing using electrical devices. The samples were collected in the kitchen, the living room and the bedroom. The total number concentration, the size distributions and mass concentration PM0.1, PM2.5 and PM10 were measured using...

TSI provides several optical and sampling techniques for sizing supermicron particles. For many applications like aerosol sprayers, spray nozzles, fractional efficiency tests or aerosol impaction behavior there are many measurement solutions in the field with individual advantages and limitations. Optical techniques are non invasive, robust and fle...

The paper is devoted the standard CEN/TS 16976 described a standardized measuring method with number concentration of UFP. As well as, described TSI 3750-CEN CPC which meet all of these requirements.

Exposure to different types of dust and other workplace aerosols can result in adverse health effects including occupational lung diseases, cancer, irritation and inflammatory lung injuries, allergic responses, infection, and effects on the skin (WHO, 1999; Peters et al., 2013). In many cases cascade impactors are used to collect size-fractionated...

Counting efficiency of various aerosol materials in a new water-based nanoparticle counter (CPC) was investigated in the laboratory. Quantifying ambient city aerosol largely shows equivalency of water-based to butanol-based ultrafine particle counters. Size distribution measurements with either butanol-or water-based particle sizers are comparable...

The particle size distribution of urban aerosols is typically dominated by ultrafine particles (UFP) originating from local sources such as traffic and industrial emissions. Due to their negligible mass they are clearly underrepresented by legislative PM10 mass measurements. This is one reason why their contribution to urban air quality is better c...

The validity of data obtained with particle counters and sizers depends on their accurate calibration against a known standard that typically is provided by the manufacturer. However, normal use of an instrument may affect the calibration over time, for instance through contamination or drift of sensors controlling the device. The recommended time...

Nucleation and new particle formation (NPF) events can make a significant contribution to particle number concentrations in remote locations (Kulmala and Kerminen, 2008) as well as urban locations (e.g. Brines et. al., 2015). While the remote NPF events have been subject to observations for years and are quite well understood, urban NPF still needs...

CEN/TS 16976 harmonizes the continuous atmospheric measurements of UFPs by defining requirements for CPC, its sampling system, the measurement procedure and result reporting. This is an important step forward for routine monitoring networks (e.g. GUAN, NABEL, DEFRA) and for evaluation of abatement techniques e.g. low emission zones. TSI released a...

Many aerosol sources of interest, like combustion, cigarette smoke, emission form nanoparticle production, cabin air in vehicles consist of particles in the size range from 10 nm to well above 1 μm. Mass limits of PM 2.5 and PM 10 demand measurement of particle size up to 2.5 μm or 10 μm, respectively. A key parameter for the source characterizatio...

The Engine Exhaust Particle Sizer™ spectrometer (EEPS, Model 3090, TSI Inc.) is widely used to measure the size distribution of fast changing exhaust particles at ambient pressure in engine research and development. It can provide particle size, number and mass at different locations in the combustion process. The EEPS records particle size distrib...

Particle size distribution measurements with Scanning Mobility Particle Sizers (SMPS) starting from 1 nm in diameter are highly demanded in science and industry for applications like gas to particle conversion, engineered nanoparticle synthesis, particle nucleation and growth, and combustion emissions research. By use of diethylene glycol (DEG) as...

The generation of aerosols containing sufficient concentrations of well-defined nanoparticles from salts, polymers, core-shell and virus like materials, vaccines or proteins is needed in various fields of in-vivo and in-vitro toxicology. We present a new Electrospray Aerosol Generator (EAG, TSI model 3482) that was designed for ease of use and stab...

An increasing number of studies are focusing on the detection and investigation of nanometer-sized particles. One important tool is the Scanning Mobility Particle Sizer (SMPS). In the case of dynamic processes like nucleation events, the lower detection threshold as well as the measurement time are important system parameters. High accuracy of the...

Nanoparticles are ubiquitous in both outdoor and indoor environments due to a large variety of natural and anthropogenic sources. Key parameters for characterizing nanoparticles include their size distribution and number concentration. A novel, portable and compact nanoparticle sizing instrument, the NanoScan SMPS, has been designed for application...

A novel instrument, the NanoScan SMPS (TSI 3910), is introduced here that provides the capability of employing well-established Scanning Mobility Particle Sizing (SMPS) technology in a format that can be easily utilized in the field. The use of a non-radioactive unipolar charger, radial Differential Mobility Analyzer (rDMA) and isopropanol-based Co...

This study provides insights into the performance of a new nano-water-based condensation particle counter (N-WCPC, TSI 3788) and presents a comparison to the well-established butanolbased ultrafine CPC (UCPC, TSI 3776). The suitability of the N-WCPC to measure ambient airborne nanoparticles of various compositions has been assessed with an urban ba...

Optical Particle Counters are in widespread use for measuring various aerosols including environmental monitoring. Since almost all optical particle counters and spectrometers are factory-calibrated with polystyrene latex (PSL) particles, sizing errors could be significant if the refractive indices of the aerosol are significantly different from th...

In order for the growing significance of nanotechnology to be addressed by occupational safety and health as well as from other aspects, workplace exposure to nanoparticles must be determined and examined. The quantity of measurement most frequently employed for nanoparticles is the particle number concentration. Seven contributions by six manufact...

In order for the growing significance of nanotechnology to be addressed by occupational safety and health as well as from other aspects, workplace exposure to nanoparticles must be determined and examined. The quantity of measurement most frequently employed for nanoparticles is the particle number concentration. Seven contributions by six manufact...

A flame-based method for generating nanoparticles with production rate in the order of g/min is presented to be used in a variety of applied studies concerning nanoparticle measurements and toxicological tests. In this study, ferric oxide, titanium dioxide, and silver nanoparticles were produced by this technique, as an example of the variety of pr...

Liquid Flame Spray (LFS) is a specific gas phase synthesis method of nanoparticles. It has recently been used in producing e.g. antimicrobial nanoparticle coatings. However, nanoparticles include a potential health risk for humans when inhaled. One can use respirator masks to protect oneself from inhaling the nanoparticles. There are also devices t...

Complex tree-like nanostructures with controlled morphology are becoming increasingly important for the development of nanoscale devices. The position of branches on III–V semiconductor nanotrees is determined by the distribution of Au seed particles. Here we report the dependence of the distribution of Au aerosol nanoparticles on nanowires on para...

Continuous-flow, thermally diffusive condensation particle counters (CPC’s) that use n-butyl alcohol (butanol) as their working fluid have been used to measure aerosol particles for more than 30 years. A new, completely redesigned general-purpose butanol CPC was developed at the end of 2005. Just one year prior to that a continuous, laminar-flow wa...

In this study calibration measurements of new TSI condensation particle counter models, using either butanol or water as working fluid, are described. Experiments were carried our at ambient, laboratory conditions for two particle materials, silver and sodium chloride. The obtained counting efficiency curves are presented.

Condensation particle counters (CPCs) are well suited to measure the number concentration of small airborne particles. Continuous-flow, thermally diffusive CPCs that utilize n-butyl alcohol (butanol) as the condensing vapour have been developed in the late 1970s (Bricard et al., 1976). The first commercial model of this type, the CNC 3020 (TSI Inc....

Ausgehend von den Grundlagen der Partikelmessmethoden für Durchmesser, Anzahl und Masse und einer Darstellung der physikalischen Wirkprinzipien werden die wichtigsten Messgeräte zur Bestimmung dieser Partikelemissionen vorgestellt. Im Einzelnen sind dies für die Anzahlverteilungsbestimmung das SMPS, EEPS und das ELPI. Für die Massenbestimmung werde...

Electrical device development is driven by miniaturization and possibilities to use new chemical and physical effects. Nanotechnology offers both aspects. The structural dimensions of materials and devices are small and because of that large exchange surfaces are provided but also effects like quantum effects may occur and be used to get new or at...

The deposition process in a homogeneous electric field, and the subsequent microscopic arrangement of charged, metallic aerosol nanoparticles in the size range of 30 nm on flat substrate surfaces is described. The first aspect of the investigation is the transfer of the particles from a three-dimensional distribution in the gas phase into their arr...

The deposition process in a homogeneous electric field, and the subsequent microscopic arrangement of charged, metallic nanoparticles in the size range below on flat substrate surfaces is described. The main aspect of the investigation is the transfer of the particles from a three-dimensional distribution in the gas phase into their arrangement on...

Arrangements of nanometer-sized particles were obtained on plane oxidized silicon substrates by direct deposition from the gas phase. The particles were attracted onto charge patterns created by contact charging. Monodisperse, singly charged indium aerosol particles with a diameter of 30 nm were used as a test case to illustrate this process. Due t...

The increasing knowledge about the properties of nanostructured materials is a source of ideas for the improvement of existing and the development of new electronic or opto-electronic devices. One approach is the implementation of nanoparticles as building blocks. Among other synthesis routes, different kinds of gas phase synthesis have been develo...