Chemical Differences in Environmental Films on Different Surfaces
Author Information
Author(s): DeYoung Jessica L., Akporere Uchechukwu Grace, Cheng Zezhen, China Swarup, Vandergrift Gregory W., Anderton Christopher R., Zhou Yadong, Zhu Zihua, Shaw Scott K.
Primary Institution: University of Iowa
Hypothesis
Environmental films on different host surfaces would be physically and chemically unique.
Conclusion
The study found that silicon surfaces collect environmental films differently than gold surfaces, affecting their physical and chemical properties.
Supporting Evidence
- Gold surfaces have a homogeneous distribution of film mass, while silicon surfaces collect films with irregular patchy domains.
- Silicon substrates support more particle aggregates, resulting in fewer but larger particles compared to gold surfaces.
- Chemical analysis revealed the presence of nitrate and sulfate on both surfaces.
Takeaway
This study looked at how different surfaces collect dirt and particles from the air, finding that some surfaces hold onto them better than others.
Methodology
The study used bright-field microscopy and computer-controlled scanning electron microscopy with energy-dispersive X-ray spectroscopy to analyze environmental films on gold and silicon surfaces.
Limitations
The study was limited by the number of replicates for TDS measurements and the specific environmental conditions during sampling.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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