The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies
In this work, we present new results of atomic force microscopy (AFM) force curves over pure ice at different temperatures, performed with two different environmental chambers and different kinds of AFM tips. Our results provide insight to resolve the controversy on the interpretation of experimenta...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_16807316_v18_n20_p14965_Constantin |
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todo:paper_16807316_v18_n20_p14965_Constantin2023-10-03T16:29:50Z The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies Constantin, J.G. Gianetti, M.M. Longinotti, M.P. Corti, H.R. atmospheric chemistry atomic force microscopy experimental study ice temperature gradient In this work, we present new results of atomic force microscopy (AFM) force curves over pure ice at different temperatures, performed with two different environmental chambers and different kinds of AFM tips. Our results provide insight to resolve the controversy on the interpretation of experimental AFM curves on the ice-air interface for determining the thickness of the quasi-liquid layer (QLL). The use of a Mini Environmental Chamber (mEC) that provides an accurate control of the temperature and humidity of the gases in contact with the sample allowed us for the first time to get force curves over the ice-air interface without jump-in (jump of the tip onto the ice surface, widely observed in previous studies). These results suggest a QLL thickness below 1nm within the explored temperature range (-7 to -2°C). This upper bound is significantly lower than most of the previous AFM results, which suggests that previous authors overestimate the equilibrium QLL thickness, due to temperature gradients, or indentation of ice during the jump-in. Additionally, we proved that the hydrophobicity of AFM tips affects significantly the results of the experiments. Overall, this work shows that, if one chooses the experimental conditions properly, the QLL thicknesses obtained by AFM lie over the lower bound of the highly disperse results reported in the literature. This allows estimating upper boundaries for the QLL thicknesses, which is relevant to validate QLL theories and to improve multiphase atmospheric chemistry models. © Author(s) 2018. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_16807316_v18_n20_p14965_Constantin |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
atmospheric chemistry atomic force microscopy experimental study ice temperature gradient |
| spellingShingle |
atmospheric chemistry atomic force microscopy experimental study ice temperature gradient Constantin, J.G. Gianetti, M.M. Longinotti, M.P. Corti, H.R. The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies |
| topic_facet |
atmospheric chemistry atomic force microscopy experimental study ice temperature gradient |
| description |
In this work, we present new results of atomic force microscopy (AFM) force curves over pure ice at different temperatures, performed with two different environmental chambers and different kinds of AFM tips. Our results provide insight to resolve the controversy on the interpretation of experimental AFM curves on the ice-air interface for determining the thickness of the quasi-liquid layer (QLL). The use of a Mini Environmental Chamber (mEC) that provides an accurate control of the temperature and humidity of the gases in contact with the sample allowed us for the first time to get force curves over the ice-air interface without jump-in (jump of the tip onto the ice surface, widely observed in previous studies). These results suggest a QLL thickness below 1nm within the explored temperature range (-7 to -2°C). This upper bound is significantly lower than most of the previous AFM results, which suggests that previous authors overestimate the equilibrium QLL thickness, due to temperature gradients, or indentation of ice during the jump-in. Additionally, we proved that the hydrophobicity of AFM tips affects significantly the results of the experiments. Overall, this work shows that, if one chooses the experimental conditions properly, the QLL thicknesses obtained by AFM lie over the lower bound of the highly disperse results reported in the literature. This allows estimating upper boundaries for the QLL thicknesses, which is relevant to validate QLL theories and to improve multiphase atmospheric chemistry models. © Author(s) 2018. |
| format |
JOUR |
| author |
Constantin, J.G. Gianetti, M.M. Longinotti, M.P. Corti, H.R. |
| author_facet |
Constantin, J.G. Gianetti, M.M. Longinotti, M.P. Corti, H.R. |
| author_sort |
Constantin, J.G. |
| title |
The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies |
| title_short |
The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies |
| title_full |
The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies |
| title_fullStr |
The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies |
| title_full_unstemmed |
The quasi-liquid layer of ice revisited: The role of temperature gradients and tip chemistry in AFM studies |
| title_sort |
quasi-liquid layer of ice revisited: the role of temperature gradients and tip chemistry in afm studies |
| url |
http://hdl.handle.net/20.500.12110/paper_16807316_v18_n20_p14965_Constantin |
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