Bioelectromechanical Properties of Alginate through Piezoresponse Force Microscopy: An Insight with a Computer Simulation with Free Radicals

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Bioelectromechanical Properties of Alginate through Piezoresponse Force Microscopy: An Insight with a Computer Simulation with Free Radicals

August 6, 2022 Physical Science 0

 The alginate biopolymer from Tropicalgin C302245 was studied using computer models, scanning electron microscopy, powder X-rays, infrared spectroscopy, and piezoresponse force microscope imaging. Local piezoresponse force microscopy pictures in the out of plane mode show possible ferroelectric zones, which are confirmed by second harmonic generation analysis. Alginate powder is composed of cristobalite-like diatom frustules, amorphous silica, and chitin. Computer simulations using the models MM+ and PM3 demonstrate how the self-assembly of alginate molecules raises the molecular collective dipole moment, boosting polarisation, and provide an explanation for the experimental observations. Initial free radical simulations reveal that the alginate biopolymer has poorer thermodynamic stability, which reduces hydrogen bonding and, consequently, ferroelectric characteristics. Alginate’s molecular characteristics may provide new opportunities for organic green technology.

Author(s) Details:

A. Heredia-Barbero,
Instituto de Ciencias Nucleares, Ciudad Universitaria, Departamento de química de radiaciones y radioquímica. Circuito Exterior S/N, Coyoacán, C.P. 04510 Ciudad de México. Universidad Nacional Autónoma de México.

J. J. Gervacio-Arciniega,
Conacyt-Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla, Apartado Postal 1152, Puebla, Puebla, 72000, México.

V. Duarte-Alaniz,
Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Cd. Universitaria, C.P. 04510, Del. Coyoacán, Ciudad de México, México.

O. Amelines-Sarria,
Centro de Investigación y Desarrollo Tecnológico en Energías Renovables, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Col. Lajas Maciel, Tuxtla Gutiérrez, Chiapas, México and  Facultad de ingeniería, Universidad de Santiago de Cali, Calle 5 # 62-00, Cali, Valle del Cauca, Colombia.

A. Rodríguez-Galván,
Carrera de Biología, Unidad de Biomedicina, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Estado de México 54090, México.

J. M. Siqueiros,
Departamento Materiales Avanzados, Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, km 107 Carretera Tijuana-Ensenada. Ensenada, Baja California. Teléfono-(646) 175-0650, México.

Please see the link here: https://stm.bookpi.org/NTPSR-V7/article/view/7778  

Keywords: Alginate, piezoresponse force microscopy, ferroelectricity, macromolecular self-assembly, free radical

 

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