English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

New particle formation and growth has a very important role in many climateprocesses. However, the overall knowlegde of the chemical composition ofatmospheric nucleation mode (particle diameter, d<20 nm) and the lower endof Aitken mode particles (d≤50 nm) is still insufficient. In this work,we have applied the UFO-TDMA (ultrafine organic tandem differential mobilityanalyzer) method to shed light on the presence of an organic fraction in thenucleation mode size class in different atmospheric environments. The basicprinciple of the organic fraction detection is based on our laboratoryUFO-TDMA measurements with organic and inorganic compounds. Our laboratorymeasurements indicate that the usefulness of the UFO-TDMA in the fieldexperiments would arise especially from the fact that atmospherically themost relevant inorganic compounds do not grow in subsaturated ethanol vapor,when particle size is 10 nm in diameter and saturation ratio is about 86%or below it. Furthermore, internally mixed particles composed of ammoniumbisulfate and sulfuric acid with sulfuric acid mass fraction ≤33%show no growth at 85% saturation ratio. In contrast, 10 nm particlescomposed of various oxidized organic compounds of atmospheric relevanceare able to grow in those conditions. These discoveries indicate that it is possible todetect the presence of organics in atmospheric nucleation mode sizedparticles using the UFO-TDMA method. In the future, the UFO-TDMA is expectedto be an important aid to describe the composition of atmosphericnewly-formed particles

A method for detecting the presence of organic fraction in nucleation mode sized particles