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On the thermal diffusivity of porous silicon.

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Title: On the thermal diffusivity of porous silicon.
Authors: Nogal, U.1, Rojas, A.1, Salazar-Flores, S. A.2, Sánchez-Nájera, J. C.3, Luviano, L.2, Hernández-Wong, J.1, Aguilar-Frutis, M.2, Rojas-Trigos, J. B.2, Marín, E.2, Calderón, A.2 jcalderona@ipn.mx
Source: Latin-American Journal of Physics Education. Dec2025, Vol. 19 Issue 4, p1-4. 4p.
Subject Terms: Thermal diffusivity, Porous silicon, Porosity, Thermal resistance, Heat transfer, Bilayers (Solid state physics), Photoacoustic effect
Abstract (English): We report a study investigating the heat-transport capacity of porous n-type silicon samples by examining their effective thermal diffusivity. The effective thermal diffusivity was measured using frequency-domain photoacoustic techniques with a two-layer model that analyzes the thermal resistance of a bilayer system. Porosity was determined through gravimetric methods. The results reveal an almost linear increase in porosity with anodizing time, accompanied by a much greater increase in the thickness of the porous layer. Additionally, we observed a pronounced decrease in effective thermal diffusivity as both porosity and porous layer thickness increased. [ABSTRACT FROM AUTHOR]
Abstract (Portuguese): Reportamos un estudio de la capacidad de transporte de calor de muestras de silicio poroso tipo n a través de un estudio de la difusividad térmica efectiva en este material. Los valores medidos de la difusividad térmica efectiva se obtienen mediante la técnica fotoacústica en el dominio de la frecuencia utilizando un modelo de dos capas que se basa en el análisis de la resistencia térmica efectiva de un sistema bicapa, y de la aplicación de la técnica de gravimetría para la determinación de la porosidad. Los resultados muestran un incremento casi lineal de la porosidad con el tiempo de anodización, así como de un incremento mucho mayor del espesor de la capa porosa con el tiempo de anodización. Asimismo, se obtiene un decremento significativo de la difusividad térmica efectiva en dependencia con la porosidad y el espesor de la capa porosa. [ABSTRACT FROM AUTHOR]
Copyright of Latin-American Journal of Physics Education is the property of Latin-American Physics Education Network and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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DbLabel: Education Research Complete
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  Data: On the thermal diffusivity of porous silicon.
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  Data: <searchLink fieldCode="AR" term="%22Nogal%2C+U%2E%22">Nogal, U.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Rojas%2C+A%2E%22">Rojas, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Salazar-Flores%2C+S%2E+A%2E%22">Salazar-Flores, S. A.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Sánchez-Nájera%2C+J%2E+C%2E%22">Sánchez-Nájera, J. C.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Luviano%2C+L%2E%22">Luviano, L.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hernández-Wong%2C+J%2E%22">Hernández-Wong, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Aguilar-Frutis%2C+M%2E%22">Aguilar-Frutis, M.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Rojas-Trigos%2C+J%2E+B%2E%22">Rojas-Trigos, J. B.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Marín%2C+E%2E%22">Marín, E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Calderón%2C+A%2E%22">Calderón, A.</searchLink><relatesTo>2</relatesTo><i> jcalderona@ipn.mx</i>
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  Data: <searchLink fieldCode="JN" term="%22Latin-American+Journal+of+Physics+Education%22">Latin-American Journal of Physics Education</searchLink>. Dec2025, Vol. 19 Issue 4, p1-4. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Thermal+diffusivity%22">Thermal diffusivity</searchLink><br /><searchLink fieldCode="DE" term="%22Porous+silicon%22">Porous silicon</searchLink><br /><searchLink fieldCode="DE" term="%22Porosity%22">Porosity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+resistance%22">Thermal resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Bilayers+%28Solid+state+physics%29%22">Bilayers (Solid state physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Photoacoustic+effect%22">Photoacoustic effect</searchLink>
– Name: Abstract
  Label: Abstract (English)
  Group: Ab
  Data: We report a study investigating the heat-transport capacity of porous n-type silicon samples by examining their effective thermal diffusivity. The effective thermal diffusivity was measured using frequency-domain photoacoustic techniques with a two-layer model that analyzes the thermal resistance of a bilayer system. Porosity was determined through gravimetric methods. The results reveal an almost linear increase in porosity with anodizing time, accompanied by a much greater increase in the thickness of the porous layer. Additionally, we observed a pronounced decrease in effective thermal diffusivity as both porosity and porous layer thickness increased. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (Portuguese)
  Group: Ab
  Data: Reportamos un estudio de la capacidad de transporte de calor de muestras de silicio poroso tipo n a través de un estudio de la difusividad térmica efectiva en este material. Los valores medidos de la difusividad térmica efectiva se obtienen mediante la técnica fotoacústica en el dominio de la frecuencia utilizando un modelo de dos capas que se basa en el análisis de la resistencia térmica efectiva de un sistema bicapa, y de la aplicación de la técnica de gravimetría para la determinación de la porosidad. Los resultados muestran un incremento casi lineal de la porosidad con el tiempo de anodización, así como de un incremento mucho mayor del espesor de la capa porosa con el tiempo de anodización. Asimismo, se obtiene un decremento significativo de la difusividad térmica efectiva en dependencia con la porosidad y el espesor de la capa porosa. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Latin-American Journal of Physics Education is the property of Latin-American Physics Education Network and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 4
        StartPage: 1
    Subjects:
      – SubjectFull: Thermal diffusivity
        Type: general
      – SubjectFull: Porous silicon
        Type: general
      – SubjectFull: Porosity
        Type: general
      – SubjectFull: Thermal resistance
        Type: general
      – SubjectFull: Heat transfer
        Type: general
      – SubjectFull: Bilayers (Solid state physics)
        Type: general
      – SubjectFull: Photoacoustic effect
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      – TitleFull: On the thermal diffusivity of porous silicon.
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              Text: Dec2025
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