Probing the Equilibrium Size and Hydrogen Bonding Structure in Aqueous Aerosol Droplets
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Lennart Treuel
Abstract
Comparative measurements on two or more optically trapped aerosol droplets can allow the hygroscopic properties of aerosol to be investigated in exquisite detail. In this paper we consider two methods for assessing the dependence on relative humidity of the water activity and solute concentration in the condensed phase. We demonstrate in this paper that using a control droplet as a microprobe of relative humidity in the vicinity of a second droplet of interest can allow the RH to be determined with an accuracy of between 0.01 to 0.1 %. Not only is such a probe highly responsive, but the accuracy of the RH determination improves with increase in GF or RH, counter to the performance of macroscopic RH probes. We also demonstrate that spontaneous Raman scattering recorded from excitation of the OH stretching vibration in supersaturated solution droplets of sodium chloride shows the considerable perturbation induced by the chloride ion on the hydrogen bonding network. Chloride is recognised as a hydrogen bonding structure breaker and these observations are shown to be consistent with measurements on more dilute solutions.
© by Oldenbourg Wissenschaftsverlag, Bristol, BS8 1TS, Germany
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- The Quest for the Hydroxyl-Peroxy Radical
- Sources and Cycling of Tropospheric Hydroxyl Radicals – An Overview
- Kinetics and Products of the Reaction O2(1Σg+) with N2O
- An Experimental and Theoretical Study of the Reaction Between NH(X3Σ−) + SO(X3Σ−)
- Pressure Dependence of Iso-Propyl Nitrate Formation in the i-C3H7O2 + NO Reaction
- Photolysis of Trichloronitromethane (Chloropicrin) under Atmospheric Conditions
- The Gas-phase Ozonolysis of 1-Penten-3-ol, (Z)-2-Penten-1-ol and 1-Penten-3-one: Kinetics, Products and Secondary Organic Aerosol Formation
- Theoretical Study of the HOCH2OO• + HO2• Reaction: Detailed Molecular Mechanisms of the Three Reaction Channels
- Studies of the Formation and Growth of Aerosol from Molecular Iodine Precursor
- Heterogeneous Chemistry of Cl2O and HOCl on Frozen Natural Sea Salt, Recrystallized Sea Salt, KCl and NaCl Solutions at 200 and 215 K
- Atmospheric Heterogeneous Reactions of Benzo(a)pyrene
- Time Resolved Infrared Spectroscopy of Formation and Processing of Secondary Organic Aerosol
- Probing the Equilibrium Size and Hydrogen Bonding Structure in Aqueous Aerosol Droplets
- Interaction of NO2 with Soot: Oxidation and Gasification at Temperatures Between 300 and 670 K
- Uptake of Organic Acids on Ice Surfaces: Evidence for Surface Modification and Hydrate Formation
- Aqueous Phase Reactivity of Nitrate Radicals (NO3) Toward Dicarboxylic Acids
- Temperature and Ionic Strength Dependence of NO3-radical Reactions with Substituted Phenols in Aqueous Solution
Artikel in diesem Heft
- Physico-Chemical Aspects of Global Atmospheric Change. Dedicated to Reinhard Zellner on the occasion of his 65th birthday
- The Quest for the Hydroxyl-Peroxy Radical
- Sources and Cycling of Tropospheric Hydroxyl Radicals – An Overview
- Kinetics and Products of the Reaction O2(1Σg+) with N2O
- An Experimental and Theoretical Study of the Reaction Between NH(X3Σ−) + SO(X3Σ−)
- Pressure Dependence of Iso-Propyl Nitrate Formation in the i-C3H7O2 + NO Reaction
- Photolysis of Trichloronitromethane (Chloropicrin) under Atmospheric Conditions
- The Gas-phase Ozonolysis of 1-Penten-3-ol, (Z)-2-Penten-1-ol and 1-Penten-3-one: Kinetics, Products and Secondary Organic Aerosol Formation
- Theoretical Study of the HOCH2OO• + HO2• Reaction: Detailed Molecular Mechanisms of the Three Reaction Channels
- Studies of the Formation and Growth of Aerosol from Molecular Iodine Precursor
- Heterogeneous Chemistry of Cl2O and HOCl on Frozen Natural Sea Salt, Recrystallized Sea Salt, KCl and NaCl Solutions at 200 and 215 K
- Atmospheric Heterogeneous Reactions of Benzo(a)pyrene
- Time Resolved Infrared Spectroscopy of Formation and Processing of Secondary Organic Aerosol
- Probing the Equilibrium Size and Hydrogen Bonding Structure in Aqueous Aerosol Droplets
- Interaction of NO2 with Soot: Oxidation and Gasification at Temperatures Between 300 and 670 K
- Uptake of Organic Acids on Ice Surfaces: Evidence for Surface Modification and Hydrate Formation
- Aqueous Phase Reactivity of Nitrate Radicals (NO3) Toward Dicarboxylic Acids
- Temperature and Ionic Strength Dependence of NO3-radical Reactions with Substituted Phenols in Aqueous Solution
