Effect of ZnO nanoparticles on the sensitivity of cholesterol detection by cyclic voltammetry

Authors

  • Lisnaida del Rosario Rojas Barreto Facultad de Ciencias de la Salud, Universidad Privada Antenor Orrego, Av. América Sur 3145, Trujillo, Perú. https://orcid.org/0009-0000-7944-8825
  • Luis Manuel Angelats Silva Facultad de Ciencias Físicas, Universidad Nacional de Trujillo, Av. Juan Pablo II s/n – Ciudad Universitaria, Trujillo, Perú. ; Facultad de Ciencias de la Salud, Universidad Privada Antenor Orrego, Av. América Sur 3145, Trujillo, Perú https://orcid.org/0000-0002-0989-9249

DOI:

https://doi.org/10.17268/rev.cyt.2025.01.09

Keywords:

Enzymatic carbon biosensor, ZnO nanoparticles, cholesterol, cyclic voltammetry, sensitivity

Abstract

In this work, the cyclic voltammetric response of the enzymatic carbon biosensor with ZnO nanoparticles (ZnO NPs) synthesized by the sol-gel route is reported, to determine the sensitivity of cholesterol detection. ZnO NPs with a wurtzite-type hexagonal structure with a hydrodynamic diameter of 11.5 nm were obtained, presenting absorbance in the UV region at 347 nm due to the formation of the exciton and with a band gap of 3.57 eV. The enzymatic carbon biosensor with ZnO NPs: COX / ZnO NPs / C, detected an increase in peak response current with increasing cholesterol concentration as well as an increase in Faradaic peak current with increasing cholesterol concentration due to the electronic transfer in the redox reaction that occurs at the biosensor-solution interface towards the electrode through its mediator, showing direct linearity between both variables from 25 mg/dL to 180 mg/dL, which was not detected without ZnO nanoparticles. The sensitivity of the biosensor was determined, obtaining a high value of 30.8 μAmM-1cm-2. ZnO nanoparticles improve the cholesterol detection sensitivity of the carbon biosensor since it immobilizes the enzymes by physical adsorption for a better interaction with cholesterol, improving the electronic transfer with the applied potential.

References

Anjum T., Hussain N., Bilal M., Iqbal H. M. (2023). Enzymatic biosensors. https://doi.org/10.1016/B978-0-323-91317-1.00006-2

Intisar A., Haider M., Imran Din M., Hussain N., Bilal M., Iqbal H. (2023). Inmovilización de enzimas sobre nanomateriales y soportes nanoestructurados. Fundamentos y aplicaciones. Fundamentos y fronteras en enzimologia. https://doi.org/10.1016/B978-0-323-91317-1.00002-5

Derina K., Korotkovaa E., Dorozhkoa E., Voronovaa O., Vishenkova D. (2014). Voltammetric sensor for total cholesterol determination. National Research Tomsk Polytechnic University, Lenin avenue 43a, Tomsk, 634050, Russia. Procedia Chemistry 10 (2014) 513 – 518

González L. E., Galán V. C. A., Rodríguez Á. J. A., Mendoza H. L. H., Páez Hernández M. E., (2021). Bio-sensores multienzimáticos para el análisis multiparamétrico con un solo dispositivo. Publicación Semes-tral Pädi Vol. 8 No. 16 (2021) 42-47

Hernandez M., Galán C. A., Avarez G.A., Paez M.E. (2011). Desarrollo de um biosensor amperométrico com configuración plana para la cuantificación de colesterol. Universidad Autónoma del Estado de Hidalgo. Area Académica de Química. Vol 22(6),25-32. Doi: 10.4067/S0718-07642011000600004

Maigler L. M. (2020). Aplicación de técnicas computacionales de acoplamiento molecular en desarrollo en-zimático. Tesis de licenciatura, Universidad Complutense de Madrid, España. https://docta.ucm.es/rest/api/core/bitstreams/d7be6209-06c6-47ab-9cd2-b7276285bea2/content

Ortiz S. E., Serratos Á. I. N., Galicia L. L. (2023). Estudio de la interacción entre la enzima ChOx y colesterol a través de cálculos de acoplamiento molecular y voltamperometría cíclica, para su aplicación a biosen-sores electroquímicos. Revista Tendencias en Docencia e Investigación en Química. https://revistatediq.azc.uam.mx

Pratima R. S., Ajeet K., Anees A. A., Malhotrab B. D. (2009). Nanostructured zinc oxide platform for choles-terol sensor. Department of Science and Technology Center on Biomolecular Electronics, National Physi-cal Laboratory, Dr. K. S. Krishnan Marg, New Delhi 110012, India. APPLIED PHYSICS LETTERS 94, 143901. DOI: 10.1063/1.3111429

Tudela V. (2002). El colesterol: lo bueno y lo malo, 3era edición fondo de cultura económica, Cd de México.

Valdés R., G.; Hernández R. F., Galicia L. (2025). Contribution to the Electrochemical Sensors and Biosen-sors field by the Electrochemical and Analytical Chemistry research areas at UAM-I. Chemistry Depart-ment, Laboratory of Electrochemistry. DOI: http://dx.doi.org/10.29356/jmcs.v69i1.2300

Zhao Z., Lei W., Zhang X., Wang B. y Jiang H. (2010). ZnO – Based Amperometric Enzyme Biosensores. School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China. 10,1216-1231; doi:10.3390/s100201216.

Published

2025-04-05

How to Cite

Rojas Barreto, L. del R. ., & Angelats Silva, L. M. . (2025). Effect of ZnO nanoparticles on the sensitivity of cholesterol detection by cyclic voltammetry. SCIÉNDO INGENIUM, 21(1), 101-108. https://doi.org/10.17268/rev.cyt.2025.01.09

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Artículos Originales