Surface Characterization and Morphological Analysis of Thin Films

Surface characterisation and morphological analysis of thin films encompass a suite of experimental and computational approaches to probe film composition, topography and structural organisation at the nanoscale. Accurate determination of surface roughness, feature distribution and microtexture is crucial for tailoring optical, electronic and tribological performance. Techniques such as atomic force microscopy generate high-resolution height maps, while power spectral density and fractal analyses quantify spatial frequency content and complexity. Complementary methods including Rutherford backscattering and spectroscopic probes yield compositional depth profiles and assess interface quality. Recent advances have seen the integration of digital twins and in-situ hyperspectral imaging, enabling real-time control of deposition processes such as physical vapour deposition. Together, these strategies inform the design of uniform, gradient and functional coatings for applications ranging from gas sensing and photovoltaics to biomedical devices, underlining the global significance of precise surface control.

Research from Nature Portfolio

Recent studies have mapped the three-dimensional morphology of co-deposited Cu/Ni bilayer films produced by sputtering and plasma-enhanced chemical vapour deposition. Atomic force microscopy combined with multifractal and stereometric analyses revealed that increasing Ni overlayer thickness modulates surface nano-pattern uniformity and local percolation pathways. Statistical evaluation indicated distinct global distribution of matter as a function of film height, while Rutherford backscattering spectra confirmed nanoparticle quality. Furthermore, the films exhibited tunable gas-sensing responses to CO via localized surface plasmon resonance shifts, demonstrating a direct link between controlled surface morphology and functional performance.

Surface Characterization and Morphological Analysis of Thin Films publication trend

The graph below shows the total number of articles in surface characterization and morphological analysis of thin films across all publications each year (not limited to Nature Index journals).

Technical terms

Atomic force microscopy (AFM): A scanning-probe technique that measures surface topography by sensing the deflection of a fine tip as it traverses a sample, producing nanoscale height maps.

Power spectral density (PSD): A mathematical analysis of surface height data that quantifies the distribution of roughness across spatial frequencies, revealing characteristic length scales.

Fractal dimension: A numerical metric that expresses the complexity and self-similarity of a surface, indicating how detail changes with observation scale.

Physical vapour deposition (PVD): A coating process in which material is vapourised in a vacuum environment and condenses onto a substrate to form thin films.

Localized surface plasmon resonance (LSPR): The collective oscillation of conduction electrons in metallic nanostructures excited by light, highly sensitive to surface morphology and local dielectric environment.

References

1. Advanced microstructure, morphology and CO gas sensor properties of Cu/Ni bilayers at nanoscale. Scientific Reports (2022).
2. Precise control and adjustment of uniformity for optical coatings on 2D and 3D components. Surface and Coatings Technology (2024).
3. Fractal Analysis on Surface Topography of Thin Films: A Review. Fractal and Fractional (2022).
4. Nanoscale 3D Spatial Analysis of Zirconia Disc Surfaces Subjected to Different Laser Treatments. Fractal and Fractional (2023).