Data Files Accompanying: Collapse Mechanisms of Nascent and Aged Sea Spray Aerosol Proxy Films

Authors:  Kimberly A. Carter-Fenk and Heather C. Allen
Journal: Atmosphere

Contact: 
Heather C. Allen, allen@chemistry.ohio-state.edu, Department of Chemistry & Biochemistry, The Ohio State University

Cite as:

Carter-Fenk, Kimberly A.; Allen, Heather C. (2019). Data from: Collapse Mechanisms of Nascent and Aged Sea Spray Aerosol Proxy Films. In Center for Aerosol Impacts on Chemistry of the Environment (CAICE). UC San Diego Library Digital Collections. https://doi.org/10.6075/J0ZK5DWH

Abbreviations:
BAM: Brewster angle microscopy
Isotherm: Surface pressure-area isotherm
MA: myristic acid
PA: palmitic acid
SA: stearic acid
3Mix: 2 MA : 4 PA : 3 SA

Files:
kacf_20181114_dataDictionary.txt: Data Dictionary

Folders:
kacf_20181114_BAMImages: Raw and Cropped/Scaled Brewster angle microscopy images
	3Mix_H2O_pH6_BAMCollapse_Cropped: Collapsed 3Mix monolayer on water at pH 5.6, cropped and scaled.
	3Mix_H2O_pH6_Raw: Collapsed 3Mix monolayer on water at pH 5.6, raw image.
	3Mix_NaCl_pH2_BAMCollapse_Cropped: Collapsed 3Mix monolayer on 0.4 M NaCl at pH 2.0, cropped and scaled.
	3Mix_NaCl_pH2_Raw: Collapsed 3Mix monolayer on 0.4 M NaCl at pH 2.0, raw image.
	3Mix_NaCl_pH6_BAMCollapse_Cropped: Collapsed 3Mix monolayer on 0.4 M NaCl at pH 5.6, cropped and scaled.
	3Mix_NaCl_pH6_Raw: Collapsed 3Mix monolayer on 0.4 M NaCl at pH 5.6, raw image.
	3Mix_NaCl_pH8_BAMCollapse_Cropped: Collapsed 3Mix monolayer on 0.4 M NaCl at pH 8.2, cropped and scaled.
	3Mix_NaCl_pH8_Raw: Collapsed 3Mix monolayer on 0.4 M NaCl at pH 8.2, raw image.

kacf_20181114_IsothermRawData: Raw surface pressure-area isotherm data
	kacf_20181114_3MixH2OpH6: 3Mix monolayer isotherm on water at pH 5.6
	kacf_20181114_3MixNaClpH2: 3Mix monolayer isotherm on 0.4 M NaCl at pH 2.0
	kacf_20181114_3MixNaClpH6: 3Mix monolayer isotherm on 0.4 M NaCl at pH 5.6
	kacf_20181114_3MixNaClpH8: 3Mix monolayer isotherm on 0.4 M NaCl at pH 8.2
	kacf_20181114_MANaClpH6: MA monolayer isotherm on 0.4 M NaCl at pH 5.6
	kacf_20181114_MANaClpH8: MA monolayer isotherm on 0.4 M NaCl at pH 8.2
	kacf_20181114_PANaClpH6: PA monolayer isotherm on 0.4 M NaCl at pH 5.6
	kacf_20181114_PANaClpH8: PA monolayer isotherm on 0.4 M NaCl at pH 8.2
	kacf_20181114_SANaClpH6: SA monolayer isotherm on 0.4 M NaCl at pH 5.6
	kacf_20181114_SANaClpH8: SA monolayer isotherm on 0.4 M NaCl at pH 8.2

Experimental Methods for Data Collection:
Materials
	MA, PA, and SA used as received
	MA, PA, and SA were dissolved in chloroform (HPLC Grade, Fisher Chemical)
	Concentrations of individual fatty acid solutions calibrated according to literature lift-off values.
	NaCl (99+%, ACS reagent, Acros Organics) was baked at 650 degrees Celsius
		Furnace (Fisher Scientific Isotemp Muffle Furnace for at least 10 hours
	Salt was dissolved in ultrapure water with a resistivity of 18.2 Megaohms*cm (Milli-Q Advantage A10)
	Aqueous pH lowered with HCl (Hydrochloric Acid, TraceMetal Grade, Fisher Scientific)
	Aqueous pH increased with NaOH (Sodium Hydroxide Pellets, Mallinckrodt Analytical Reagent)
	pH 8.2 solution initially prepared at pH 8.5 so that the pH would drop to 8.2 while data was recorded.
Surface Pressure-Area Isotherms
	Teflon Langmuir Mini-Micro trough; KSV NIMA, Finland, trough area = 144.5 cm^2
	Delrin barriers; KSV NIMA, Finland
	Wilhelmy plate method: filter paper plate (Ashless grade, Whatman)
	Isotherm software: KSV NIMA/Attension Device Server Software, Version 2.3
	Each isotherm curve averaged in Origin 9.0.0
	Error = 1 standard deviation from the average; calculated in Origin 9.0.0
Brewster Angle Microscopy
	Laser: 1.5 mW He-Ne, 543 nm, linear 500:1 polarization, Meredith Instruments, Peoria, AZ
	Glan-laser calcite polarizer, Thorlabs, Newton, NJ
	Objective lens: 10X infinity-corrected SLWD CFI60 TU Plan EPI, Nikon Instruments, Melville, NY
	Tube lens, focal length 200 mm, MXA22018, Nikon Instruments
	Camera: back-illuminated EM-CCD, iXon DV887-BV, Andor Technology USA, Concord, MA, 512 x 512 active pixels
	Images processed in ImageJ 1.52a
	2 pixels = 3 microns
	Images cropped from their original size of 8.2 x 8.2 mm to show only the region of highest resolution