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| Νανοεπανακοπή× | Δυναμική Σκέδαση Φωτός× | |
|---|---|---|
| Πεδίο | Επιστήμη Υλικών | Επιστήμη Υλικών |
| Οικογένεια | Process / pipeline | Process / pipeline |
| Έτος προέλευσης≠ | 1992 | 1964 |
| Δημιουργός≠ | Warren Oliver | Robert Pecora |
| Τύπος | Measurement method | Measurement method |
| Θεμελιώδης πηγή≠ | Oliver, W. C., & Pharr, G. M. (1992). An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. Journal of Materials Research, 7(6), 1564-1583. DOI ↗ | Pecora, R. (1964). Spectral distribution of scattered light from a suspension of particles. Physica, 30(11), 2055-2070. link ↗ |
| Εναλλακτικές ονομασίες | nanoindentation, instrumented indentation, depth-sensing indentation | DLS, photon correlation spectroscopy, particle size measurement |
| Συναφείς | 3 | 3 |
| Σύνοψη≠ | Nanoindentation, or instrumented indentation, is a technique for measuring the hardness and elastic modulus of materials by pressing a hard probe into a sample surface and continuously recording load and penetration depth. Developed by Oliver and Pharr in 1992, nanoindentation enables measurement of mechanical properties of thin films, small volumes, and nanoscale structures with spatial resolution approaching micrometers. It is the standard tool in materials science for characterizing coatings, interfaces, and mechanical properties at the submicron scale. | Dynamic Light Scattering (DLS), also known as Photon Correlation Spectroscopy (PCS), is an analytical technique for determining the size and size distribution of particles suspended in fluids by analyzing the time-dependent intensity fluctuations of scattered laser light. Developed by Robert Pecora in 1964, DLS exploits the Brownian motion of particles: smaller particles move faster, causing faster intensity fluctuations; larger particles move slower, causing slower fluctuations. By correlating intensity over time, particle size is deduced. DLS is rapid, non-destructive, and requires minimal sample volume, making it the standard technique for characterizing nanoparticles, proteins, colloids, and emulsions. |
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