Thermal and Elastic Characterization of Nanostructured Fe2O3 Polymorphs and TiO2-Coated Fe2O3 Using Open Photoacoustic Cell

Jovančić, N.; Markushev, D. D.; Aleksić, Slavoljub; Korte, Dorota; Franko, Mladen

doi:10.1007/s10765-020-02669-w

Cited by 9 publications

(19 citation statements)

References 43 publications

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“…The photoacoustic response of the two-layer sample irradiated with the modulated light source (Figure 1) [16,17,20] can be theoretically described by the total PA signal ( ) total pf  defined with the simple equation [13,14]:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…are the thermal diffusion (TD), thermoelastic (TE) and plasma elastic (PE) PA signal components, respectively. Using a simple 1D theoretical model [13,16,17,20] these components can be written as:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…T l f is the dynamic temperature variation at the substrate rear (nonilluminated) surface [18][19][20], V0 is the photoacoustic cell volume, and Uz,c(r,z) is the sample displacement along the z-axes.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The Uz,c(r,z) of the two-layer sample at the back surface, z = l2, important in a transmission photoacoustic measurements, can be written in a general form as [16,17,20]:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…and 2 E are the Young's modulus of the film and substrate, respectively, n d is the coefficient of electronic deformation and MT1 , MT2 , Mn , NT1, NT2 and Nn are defined as [16,17,20] ( )…”

Section: Theoretical Backgroundmentioning

confidence: 99%

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Enhancement of the thermoelastic component of the photoacoustic signal of silicon membranes coated with a thin TiO2 film

Markushev

Aleksić

et al. 2022

Journal of Applied Physics

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The reduction of the photogenerated charge carriers' influence in periodically illuminated thin silicon membranes is investigated by using the experimental setup of an open photoacoustic cell in the standard range of modulation frequencies from 20 Hz to 20 kHz. It is confirmed that the deposition of a 200 nm thin film of titanium dioxide on the 30- and 50 μm silicon membrane leads to a large increase of the thermoelastic component of the photoacoustic signal, which restores the flexibility lost to the membrane under the influence of photogenerated carriers. The effect of the thermoelastic component enhancement is analyzed by observing the displacement of the tested samples along the heat propagation axis, depending on the carrier density and temperature differences on the illuminated and unilluminated sides, for different membrane thicknesses and a constant film thickness. It is found that the effect of enhancement of several orders of magnitude is more visible in thinner membranes due to higher ratios between the film and membrane thicknesses.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The Uz,c(r,z) of the two-layer sample at the back surface, z = l2, important in a transmission photoacoustic measurements, can be written in a general form as [16,17,20]:…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

See 3 more Smart Citations

Enhancement of the thermoelastic component of the photoacoustic signal of silicon membranes coated with a thin TiO2 film

Markushev

Aleksić

et al. 2022

Journal of Applied Physics

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The Influence of the Surface Micro-structure Change on the Stainless Steel Effective Thermal Diffusivity

Somer

Novatski²,

Cruz³

et al. 2022

Int J Thermophys

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Thermal lensing and photoacoustics as potential tools for nanomaterial characterization: a review

Swapna,

Sankararaman,

Korte

2024

J Mater Sci

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This comprehensive review highlights the versatile applications of photothermal techniques, particularly thermal lens spectrometry (TLS) and photoacoustic spectrometry (PAS), in the field of nanomaterials characterization. TLS is an effective technique in the trace detection of different compounds in liquid samples, photodegradation studies, and analysis of photocatalytic reaction rate, as well as the study of molecular dynamics, impacting both environmental and catalytical research. It enables the optimization of thermal diffusivity in soot nanofluids and offers insights into seed germination and plant yield enhancement in nanobiophotonics. The review also explores the thermal and elastic characterization of Fe2O3 polymorphs by photoacoustic spectroscopy (PAS). Investigating the metal mirror demonstrates PAS’s efficacy in determining its reflection coefficient and thermal diffusivity. ZnO nanoparticles’ strong absorption on diatomite surfaces is revealed through PAS, emphasizing their effectiveness in light absorption enhancement. Furthermore, PA techniques address working frequency limitations in studying silicon-based nanomaterials. Thus, thermal lens and photoacoustic spectroscopy assume pivotal roles in unveiling the nuanced attributes of various nanostructured materials, thereby propelling advancements in the realms of science and technology.

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Thermal and Elastic Characterization of Nanostructured Fe2O3 Polymorphs and TiO2-Coated Fe2O3 Using Open Photoacoustic Cell

Cited by 9 publications

References 43 publications

Enhancement of the thermoelastic component of the photoacoustic signal of silicon membranes coated with a thin TiO2 film

Enhancement of the thermoelastic component of the photoacoustic signal of silicon membranes coated with a thin TiO2 film

The Influence of the Surface Micro-structure Change on the Stainless Steel Effective Thermal Diffusivity

Thermal lensing and photoacoustics as potential tools for nanomaterial characterization: a review

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