Abstract
Techniques for processing nanoscale metallic structures with spatial order and tunable physical characteristics, such as size and microstructure, are paramount to realizing applications in the areas of magnetism, optics, and sensing. This paper discusses how pulsed laser melting of ultrathin films can be a powerful but simple and cost-effective technique to fabricate functional nanostructures. Ultrathin metal films (1 nm to 1,000 nm) on inert substrates like SiO2 are generally unstable, with their free energy resembling that of a spinodal system. Such films can spontaneously evolve into predictable nanomorphologies with well-defined length scales. This study reviews this laser-based experimental technique and provides examples of resulting robust nanostructures that can have applications in magnetism and optics.
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F. Ross, J. Tersoff, and R. Tromp, “Coarsening of Self-assembled Ge Quantum Dots on Si(001),” Phys. Rev. Lett., 80 (1998), pp. 984–987.
S. Kondo and R. Asal, “A Reaction-Diffusion Wave on the Skin of the Marine Angelfish Pomacanthus,” Nature, 376 (1993), pp. 765–768.
J. Trice et al., “Investigation of Pulsed Laser Induced Dewetting in Nanoscopic Co Films: Theory and Experiments,” Phys. Rev. B, 75 (2007), no. 235439.
A. Ashton et al., “Formation of Coastline Features by Large-scale Instabilities Induced by High-angle Waves,” Nature, 414 (2001), pp. 296–300.
H.A. Atwater, “The Promise of Plasmonics,” Scientific American, 296(4) (2007), pp. 56–63.
M. Quinten et al., “Electromagnetic Energy Transport via Linear Chains of Silver Nanoparticles,” Opt. Lett., 23 (1998), p. 1331.
J. Krenn et al., “Direct Observation of Localized Surface Plasmon Coupling,” Phys. Rev. B, 60 (1999), pp. 5029–5033.
M.L. Brongerman, J.W. Hartman, and H.A. Atwater, “Electromagnetic Energy Transfer and Switching in Nanoparticle Chain Arrays below the Diffraction Limit,” Phys. Rev. B, 62 (2000), no. R16356.
S. Sun et al., “Monodisperse FePt Nanoparticles and Ferromagnetic FePt Nanocrystal Superlattices,” Science, 287 (2000), pp. 1989–1992.
S. Fan et al., “Self-Oriented Regular Arrays of Carbon Nanotubes and Their Field Emission Properties,” Science, 283 (1999), pp. 512–514.
P.M. Ajayan and S. Iijima, “Capillarity-induced Filling of Carbon Nanotubes,” Nature, 361 (1993), pp. 333–334.
C.-H. Kiang et al., “Molecular Nanowires of 1 nm Diameter from Capillary Filling of Single-Walled Carbon Nanotubes,” J. Phys. Chem. B, 103 (1999), pp. 7449–7451.
S. Serrano-Guisan et al., “Enhanced Magnetic Field Sensitivity of Spin-dependent Transport in Cluster-assembled Metallic Nanostructures,” Nat. Mat., 5 (2006), pp. 730–734.
Y. Wu et al., “Spin Injection from Ferromagnetic Co Nanoclusters into Organic Semiconducting Polymers,” Phys. Rev. B, 75(7) (2007), no. 075413.
A.K. Gangopadhyay et al., “Heterogeneous Nucleation of Amorphous Alloys on Catalytic Nanoparticles to Produce 2D Patterned Nanocrystal Arrays,” Nanotechnology, 18 (2007), no. 485606.
J. Bischof et al., “Dewetting Modes of Thin Metallic Films: Nucleation of Holes and Spinodal Dewetting,” Phys. Rev. Lett., 77(8) (1996), pp. 1536–1539.
J. Bischof et al., “Behavior of Thin Metallic Films Melted with a Nanosecond Laser Pulse,” 2777 (1996), pp. 119–127.
S. Herminghaus et al., “Spinodal Dewetting in Liquid Crystal and Liquid Metal Films,” Science, 282 (1998), pp. 916–919.
S.J. Henley, J.D. Carey, and S.R.P. Silva, “Pulsed-laser-induced Nanoscale Island Formation in Thin Metal-on-oxide Films,” Phys. Rev. B, 72 (2005), pp. 195408-1–195408-10.
C. Favazza et al., “Nanoparticle Ordering by Dewetting of Co on SiO2,” J. Electron. Mater., 35 (2006), pp. 1618–1620.
C. Favazza et al., “Laser-induced Short-and Long-range Ordering of Co Nanoparticles on SiO2,” Appl. Phys. Lett., 88 (2006), pp. 1531181–1531183.
C. Favazza, R. Kalyanaraman, and R. Sureshkumar, “Robust Nanopatterning by Laser-induced Dewetting of Metal Nanofilms,” Nanotechnology, 17 (2006), pp. 4229–4234.
C. Favazza et al., “Self-organized Metal Nanostructures through Laser-interference Driven Thermocapillary Convection,” Appl. Phys. Lett., 91 (2007), no. 043105.
J. Trice et al., “Novel Self-organization Mechanism in Ultrathin Liquid Films: Theory and Experiment,” Phys. Rev. Lett., 101 (2008), no. 017802.
J.W. Cahn, “Phase Separation by Spinodal Decomposition in Isotropic Systems,” J. Chem. Phys., 62 (1965), pp. 93–99.
G. Reiter, “Dewetting of Thin Polymer Films,” Phys. Rev. Lett., 68(1) (1992), pp. 75–78.
U. Thiele, M. Mertig, and W. Pompe, “Dewetting of an Evaporating Thin Liquid Film: Heterogeneous Nucleation and Surface Instability,” Phys. Rev. Lett., 80(13) (1998), pp. 2869–2872.
T. Stange and D. Evans, “Nucleation and Growth of Defects Leading to Dewetting of Thin Polymer Films,” Langmuir, 13 (1997), pp. 4459–4465.
U. Thiele, M.G. Velarde, and K. Neuffer, “Dewetting: Film Rupture by Nucleation in the Spinodal Regime,” Phys. Rev. Lett., 87(1) (2001), no. 016104.
B.J. Spencer, P.W. Voorhees, and S.H. Davis, “Morphological Instabilities in Epitaxially Strain Dislocation-Free Solid Films,” Phys. Rev. Lett., 67 (1991), pp. 3696–3699.
W. Lu and Z. Suo, “Dynamics of Nanoscale Pattern Formation of an Epitaxial Monolayer,” J. Mech. Phys. Solids, 49 (2001), pp. 1937–1950.
F.K. LeGoues et al., “Surface-Stress-Induced Order in SiGe Alloy Films,” Phys. Rev. Lett., 64 (1990), pp. 2038–2042.
J. Israelachvili, Intermolecular and Surface Forces (London: Academic Press, 1992), pp. 137–159.
V.A. Parsegian, Van der Waals Forces: A Handbook for Biologists, Chemists, Engineers, and Physicists (New York: Cambridge University Press, 2006).
A. Vrij, “Possible Mechanism for the Spontaneous Rupture of Thin, Free Liquid Films,” Discuss. Faraday Soc., 42 (1966), pp. 23–27.
A. Vrij and J.T.G. Overbeek, “Rupture of Thin Liquid Films Due to Spontaneous Fluctuations in Thickness,” J. Am. Chem. Soc., 90 (1968), pp. 3074–3078.
A. Sharma and E. Ruckenstein, “Finite-Amplitude Instability of Thin Free and Wetting Films: Prediction of Lifetimes,” Langmuir, 2 (1986), pp. 480–494.
A. Sharma, “Relationship of Thin Film Stability and Morphology to Macroscopic Parameters of Wetting in the Apolar and Polar Systems,” Langmuir, 9(3) (1993), pp. 861–869.
R. Seemann, S. Herminghaus, and K. Jacobs, “Dewetting Patterns and Molecular Forces,” Phys. Rev. Lett., 86 (2001), pp. 5534–5537.
R. Pretorius, J. Harris, and M.-A. Nicolet, “Reaction of Thin Metal Films with SiO2 Substrates,” Sol. State Elect., 21 (1978), pp. 667–675.
L.H. Ho et al., “Evidence of Co/SiO2 Reaction during Rapid Thermal Annealing,” J. Mater. Res., 8 (1993), pp. 467–472.
X. Hu, D. Cahill, and R. Averback, “Nanoscale Pattern Formation in Pt Thin Films due to Ion-beam Induced Dewetting,” Appl. Phys. Lett., 76 (2000), pp. 3215–3217.
F. Brochard Wyart and J. Daillant, “Drying of Solids Wetted by Thin Liquid Films,” Can. J. Phys., 68(199), pp. 1084–1088.
H. Krishna et al., “Unusual Size-dependent Magnetization in Near Hemispherical Co Nanomagnets on SiO2 from Fast Pulsed Laser Processing,” J. Appl. Phys., 103(7) (2008), no. 073902.
X. Chen, S. Mandre, and J.J. Feng, “Partial Coalescence between a Drop and a Liquid-liquid Interface,” Phys. Fl., 18(5) (2006), no. 051705.
Z. Shan et al., “Grain Boundary-Mediated Plasticity in Nanocrystalline Nickel,” Science, 305 (2004), pp. 654–657.
H. Krishna et al., “Laser-induced Dewetting Nanomorphologies in Single and Bilayer Metal Films,” Vol. 960E (Warrendale, PA: MRS, 2007), pp. 0960-N03-02.
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Krishna, H., Favazza, C., Gangopadhyay, A.K. et al. Functional nanostructures through nanosecond laser dewetting of thin metal films. JOM 60, 37–42 (2008). https://doi.org/10.1007/s11837-008-0115-y
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DOI: https://doi.org/10.1007/s11837-008-0115-y