The interaction between algae and solid surfaces is of direct interest for the optimization of biofuel production technologies. Silica is particularly relevant due the use of solgel matrices for enhanced growth and ease of processing, where ionic strength variation is an important consideration. Here, an inverted fluorescence experiment is used to perform measurements of the distance between a silica surface and algae in solution. At low ionic strength, the average algae–silica distance is approximately 90 nm but increases to roughly 130 nm at 1 M NaCl, contradicting the prediction based on simple electrical double layer interaction models. These findings illustrate the role of biochemical and electrostatic interactions at charged aqueous interfaces of relevance to biofuel production.
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7 June 2023
Research Article|
June 05 2023
Algae–water–silica interactions in low and high ionic strength environments
Special Collection:
Solid-Liquid Interfaces: Atomic-Scale Structure and Dynamics
Md. Shafiul Azam
;
Md. Shafiul Azam
(Conceptualization, Investigation, Writing – original draft, Writing – review & editing)
1
Department of Chemistry, University of Victoria
, Victoria, British Columbia V8W 3V6, Canada
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Xinguo Lu
;
Xinguo Lu
(Formal analysis, Investigation, Methodology, Software)
1
Department of Chemistry, University of Victoria
, Victoria, British Columbia V8W 3V6, Canada
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Bhumika S. Rathore
;
Bhumika S. Rathore
(Formal analysis, Investigation, Methodology, Software)
1
Department of Chemistry, University of Victoria
, Victoria, British Columbia V8W 3V6, Canada
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Rakesh Padhan
;
Rakesh Padhan
(Formal analysis, Investigation, Methodology, Software)
1
Department of Chemistry, University of Victoria
, Victoria, British Columbia V8W 3V6, Canada
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Zhijing Wan;
Zhijing Wan
(Formal analysis, Investigation, Methodology)
1
Department of Chemistry, University of Victoria
, Victoria, British Columbia V8W 3V6, Canada
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Dennis K. Hore
Dennis K. Hore
a)
(Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Software, Supervision, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Chemistry, University of Victoria
, Victoria, British Columbia V8W 3V6, Canada
2
Department of Computer Science, University of Victoria
, Victoria, British Columbia V8W 3P6, Canada
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the Special Topic on Solid-Liquid Interfaces: Atomic-Scale Structure and Dynamics.
J. Appl. Phys. 133, 215304 (2023)
Article history
Received:
February 27 2023
Accepted:
May 19 2023
Citation
Md. Shafiul Azam, Xinguo Lu, Bhumika S. Rathore, Rakesh Padhan, Zhijing Wan, Dennis K. Hore; Algae–water–silica interactions in low and high ionic strength environments. J. Appl. Phys. 7 June 2023; 133 (21): 215304. https://doi.org/10.1063/5.0147949
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