First measurements of the number size distribution of 1–2 nm aerosol particles released from manufacturing processes in a cleanroom environment
Lauri Ahonen,Juha Kangasluoma,J. Lammi,Katrianne Lehtipalo,Kaarle Hämeri,Tuukka Petäjä,Markku Kulmala +6 more
TLDR
In this paper, a measurement campaign was conducted to observe a potential formation and/or release of aerosol particles related to manufacturing processes inside a cleanroom, where atomic layer deposition (ALD), sputtering, and lithography processes were conducted.Abstract:
This study was conducted to observe a potential formation and/or release of aerosol particles related to manufacturing processes inside a cleanroom. We introduce a novel technique to monitor airborne sub 2 nm particles in the cleanroom and present results from a measurement campaign during which the total particle number concentration (>1 nm and >7 nm) and the size resolved concentration in the 1 to 2 nm size range were measured. Measurements were carried out in locations where atomic layer deposition (ALD), sputtering, and lithography processes were conducted, with a wide variety of starting materials. During our campaign in the clean room, we observed several time periods when the particle number concentration was 105 cm−3 in the sub 2 nm size range and 104 cm−3 in the size class larger than 7 nm in one of the sampling locations. The highest concentrations were related to the maintenance processes of the manufacturing machines, which were conducted regularly in that specific location. Our measur...read more
Citations
More filters
Journal ArticleDOI
Overview of measurements and current instrumentation for 1–10 nm aerosol particle number size distributions
Juha Kangasluoma,Juha Kangasluoma,Runlong Cai,Runlong Cai,Jingkun Jiang,Chenjuan Deng,Dominik Stolzenburg,Dominik Stolzenburg,Lauri Ahonen,Tommy Chan,Yueyun Fu,Changhyuk Kim,Changhyuk Kim,Tiia Laurila,Ying Zhou,Lubna Dada,Juha Sulo,Richard C. Flagan,Markku Kulmala,Markku Kulmala,Tuukka Petäjä,Katrianne Lehtipalo,Katrianne Lehtipalo +22 more
TL;DR: In this article, the authors present a comprehensive uncertainty analysis for these methods that suggests that their present understanding on the sources of uncertainties quite well captures the observed deviations between different instruments in the size distribution measurements, and suggest guidelines for selecting suitable instruments for various applications.
Journal ArticleDOI
Review of sub-3 nm condensation particle counters, calibrations, and cluster generation methods
Juha Kangasluoma,Michael Attoui +1 more
TL;DR: In this paper, a review discusses the developments in aerosol instrumentation that have led to the current vapor condensation-based instruments capable of detecting sub-3'nm particles.
Journal ArticleDOI
Nanocluster Aerosol Emissions of a 3D Printer
Mikko Poikkimäki,Ville Koljonen,Niko Leskinen,Mikko Närhi,Oskari Kangasniemi,Oskari Kausiala,Miikka Dal Maso +6 more
TL;DR: The NCA emissions constitute from 9 up to 48 percent of the total emissions, i.e., almost half of the particle emissions may have been previously neglected, therefore, it is essential to include the low NCA size range in, e.g., future 3D printer testing protocols, emission measurements standards and risk management measures.
Journal ArticleDOI
Counting on chemistry: laboratory evaluation of seed-material-dependent detection efficiencies of ultrafine condensation particle counters
Peter Josef Wlasits,Dominik Stolzenburg,Dominik Stolzenburg,Christian Tauber,Sophia Brilke,Sebastian Schmitt,Paul M. Winkler,Daniela Wimmer +7 more
TL;DR: In this paper, the influence of the seed particle material on the detection efficiencies and the 50% cutoff diameters of commonly used CPCs for the detection of sub-10 nm particles was investigated.
Journal ArticleDOI
Data inversion methods to determine sub-3 nm aerosol size distributions using the particle size magnifier
Runlong Cai,Runlong Cai,Dongsen Yang,Lauri Ahonen,Linlin Shi,Frans Korhonen,Yan Ma,Jiming Hao,Tuukka Petäjä,Jun Zheng,Juha Kangasluoma,Juha Kangasluoma,Jingkun Jiang +12 more
TL;DR: In this article, the performance of the stepwise method, the kernel function method (Lehtipalo et al., 2014), the H&A linear inversion method (Hagen and Alofs, 1983), and the expectation-maximization (EM) algorithm were compared.
References
More filters
Journal ArticleDOI
Toxic Potential of Materials at the Nanolevel
TL;DR: The establishment of principles and test procedures to ensure safe manufacture and use of nanomaterials in the marketplace is urgently required and achievable.
Journal ArticleDOI
Nanotoxicology: An Emerging Discipline Evolving from Studies of Ultrafine Particles
TL;DR: Results of older bio-kinetic studies with NSPs and newer epidemiologic and toxicologic studies with airborne ultrafine particles can be viewed as the basis for the expanding field of nanotoxicology, which can be defined as safety evaluation of engineered nanostructures and nanodevices.
Journal ArticleDOI
Formation and growth rates of ultrafine atmospheric particles: a review of observations
Markku Kulmala,Hanna Vehkamäki,Tuukka Petäjä,M. Dal Maso,Antti Lauri,V.-M. Kerminen,Wolfram Birmili,Peter H. McMurry +7 more
TL;DR: In this paper, the formation rate of 3-nm particles is often in the range 0.01-10 cm −3 s −1 in the boundary layer in urban areas and in coastal areas and industrial plumes.
Journal ArticleDOI
Respiratory effects are associated with the number of ultrafine particles.
TL;DR: The present study suggests that the size distribution of ambient particles helps to elucidate the properties of ambient aerosols responsible for health effects.
Journal ArticleDOI
The potential risks of nanomaterials: a review carried out for ECETOC
Paul J. A. Borm,David Robbins,Stephan Haubold,Thomas A. J. Kuhlbusch,Heinz Fissan,Ken Donaldson,Roel P. F. Schins,Vicki Stone,Wolfgang G. Kreyling,Jürgen Lademann,Jean Krutmann,David B. Warheit,Eva Oberdörster +12 more
TL;DR: This review shows that only few specific nanoparticles have been investigated in a limited number of test systems and extrapolation of this data to other materials is not possible, and limited ecotoxicological data for nanomaterials precludes a systematic assessment of the impact of Nanoparticles on ecosystems.