Journal Article

PUBDB-2026-00466

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Sequential growth of Ag nanoparticles on ripple-patterned Si: Insights from GISAXS/GIWAXS and MD simulations

Lamba, T. K. (Corresponding author)Extern* ; Vashistha, T. ; Singh, S.Extern* ; Sooraj, K. P. ; Augustine, S. ; Ranganathan, R. ; Vayalil, S. K.DESY* ; Kumar, D.Extern* ; Ranjan, M. (Corresponding author)Extern*

2026
Elsevier Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.physb.2025.418066

Abstract: The spatial arrangement and morphology of metallic NPs critically influence performance in plasmonic and spintronic applications. Substrate topography, especially ion-irradiation induced ripple patterns, strongly affects NP nucleation, growth dynamics, and final geometry. For Ag-NPs on nanoripple silicon, assembly depends on deposition direction because the morphology is intrinsically asymmetric; GISAXS confirms one slope is steeper. Single-direction deposition promotes uniaxial, ellipsoidal Ag-NPs aligned in the ripple direction, whereas sequential deposition yields truncated NPs with more uniform spacing. GIWAXS indicates an FCC structure with preferred (111) and (200) orientations; d-spacings remain consistent at 0° and 90°, indicating structural stability. Molecular dynamics simulations support these findings, showing single-sided flux favors tilted, elongated growth, while sequential flux forms near-spherical NPs near ridge regions and distributes them across slopes. Together, experiment and simulation establish how coupling surface asymmetry with deposition geometry governs NP shape, ordering, and crystallinity, offering a substrate-guided route to engineering isotropic assemblies.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. INDIA-DESY - INDIA-DESY Collaboration (2020_Join2-INDIA-DESY) (2020_Join2-INDIA-DESY)

Experiment(s):

1. PETRA Beamline P03 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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