Characteristics of airborne gold aggregates generated by various methods: mass mobility characteristics and surface area
type: Dataset
distribution: Landing page for the dataset
title: Karaktäristik av guldaggregat genererade med hjälp av olika metoder: massa mobilitet och ytarea @sv
description: Aggregates are a common particle type in the air - irregular particles built up by smaller primaries/monomers. One aim of the work is to present and test methods, experimental and theoretical, to characterize aggregates in the transition regime with regards to properties relevant for toxicological and nano-technological applications. Furthermore, we characterize and compare the properties of the gold-aggregates generated by three generators. The generators tested were a high temperature evaporation furnace (HT) and two spark discharge generators, one commercially available (SDGP) and a custom built (SDGC). The SDGC has been applied in several studies relevant for toxicology. For the characterization both online instrumentation, such as differential mobility analyzer and aerosol particle mass analyzer coupled in series (DMA-APM) and differential mobility particle sizer (DMPS), and off-line transmission electron microscopy techniques were used. Except from size, number, mass, and morphology, the surface area is a property of special interest. Based on the experimental data, the total surface area content of the aerosols was estimated using four approaches and the results are compared and discussed. In general, the aggregate properties of the SDGC differ from the commercial, SDGP, with most of its properties lying between the SDGP and the HT. The mass-mobility relationship show that the particles were aggregated and was well described by a power-law function down to the smallest size measured (15 nm), with exponents of 2.18-2.35. Even though similar exponents, the effective density of the aggregates differs between generators. The diameters of the primaries composing the aggregates were ~5-10 nm depending on method and weighting, held together by a bridge corresponding to 62-70 % of the primary particle diameter. The observed variation in effective density could partly be explained by the analyzed primary particle size. The predicted total surface areas, calculated usi…
description: Studien testar och jämför en ny in-house gnistgenerator med kommersiella motsvarigheter. Utfallet karaktäriseras med avseende på massa och mobilitet. I karaktäriseringen används välkända instrument som DMA och APM. Olika metoder för att beräkna ytarea jämförs. Syfte: Karaktärisera aerosoler av guldaggregat med avseende på massa och mobilitet. Zip-filen innehåller data i excelformat, uppdelat på två flikar. Den första avser den uppmätta storleken på olika partiklar vid ett hundratal observationer, indelat efter generatortyp. Den andra fliken visar resultat för tester av de olika generatorerna, där oberoendevariabeln är partikelstorlek och de beroende variablerna är vikt, shape factor samt effektiv densitet. Zip-filen innehåller även kodbok med variabelbeskrivningar på engelska. @sv
modified: 2020-05-15T13:55:20Z
issued: 2015-03-17T00:00:00Z
publisher: Lund University
access rights: PUBLIC
qualified attribution: Attribution
  had role: principalInvestigator
  agent: Christian Svensson
    type: Agent
    type: PrivateIndividual(s)
keyword: APM (aerosol particle mass analyzer)
keyword: nano aggregates
keyword: nanoaggregat @sv
keyword: aerosol
keyword: DMA (Differential Mobility Analyzer)
keyword: DMA (differential mobility analyzer) @sv
keyword: mobility
keyword: mobilitet @sv
keyword: mass
keyword: massa @sv
temporal: PeriodOfTime
  start date: 2011
  end date: 2011
language: ENG

Landing page for the dataset
type: Distribution
title: Landningssida för datasetet @sv
access URL: Characteristics of airborne gold aggregates generated by various methods: mass mobility characteristics and surface area
availability: stable

Lund University
type: Agent
name: Lunds universitet @sv
type: Academia-ScientificOrganisation
source: 012a77v79