Abstract
The effect of excess surfactants (oleic acids) in a colloidal solution on the adsorption behavior of 9.5-nm-sized, sterically stabilized iron oxide (γ-Fe2O3) nanoparticles on hydrogen terminated Si (Si:H) substrates during a dip-coating process is examined. While the particle coverage follows a type of Langmuir adsorption isotherm as initially increasing and subsequently saturating with increasing particle concentration, it also critically depends on the excess surfactant concentration in the solution. For instance, it is noted that by adding the oleic acids from 0.06 to 2.80 × 1018 ml−1 in the solution with 4.65 × 1013 ml−1 particle concentration, the coverage is gradually reduced from 0.42 to 0.25. In addition, increasing surfactant concentration distinctly changes the morphology of a self-assembled particle layer from densely distributed smaller clusters to sparsely connected, larger ones with enlarged space. The reduced coverage and enlarged cluster size with increasing oleic acid concentration are explained by the reduced interaction energy between particle and substrate and the increased capillary force between particles.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Chen S (2001) Langmuir-Blodgett fabrication of two-dimensional robust cross linked nanoparticle assemblies. Langmuir 17:2878–2884
Coe S, Woo W, Bawendi M, Bulovic V (2002) Electroluminescence from single monolayers of nanocrystals in molecular organic devices. Nature 420:800–803. doi:10.1038/nature01217
Cui Y, Bjork MT, Liddle JA, Sonnichsen C, Boussert B, Alivisatos AP (2004) Integration of colloidal nanocrystals into lithographycally patterned devices. Nano Lett 4:1093–1098. doi:10.1021/nl049488i
Dimitrov AS, Nagayama K (1996) Continuous convective assembling of fine particles into two-dimensional arrays on solid surfaces. Langmuir 12:1303–1311. doi:10.1021/la9502251
Feder J, Giaever I (1980) Adsorption of ferritin. J Colloid Interface Sci 78:144–154. doi:10.1016/0021-9797(80)90502-0
Grabert H, Devoret MH (1992) Single charge tunneling: Coulomb blockade phenomena in nanostructures. Plenum, New York
Guo Q, Teng X, Rahman S, Yang H (2003) Patterned Langmuir-Blodgett films of monodisperse nanoparticles of iron oxide using soft lithography. J Am Chem Soc 125:630–631. doi:10.1021/ja0275764
Holtz JH, Asheer SA (1997) Polymerized colloidal crystal hydrogel films as intelligent chemical sensing materials. Nature 389:829–832. doi:10.1038/39834
Hong Y, Kim H, Lee G, Kim W, Park J, Chen J et al (2002) Controlled two-dimensional distribution of nanoparticles by spin-coating method. Appl Phys Lett 80:844–846. doi:10.1063/1.1445811
Hussain Y, Krim J, Grant C (2005) OTS adsorption: a dynamic QCM study. Coll Surf A 262:81–86. doi:10.1016/j.colsurfa.2005.03.016
Israelachvili J (1997) Intermolecular & surface forces. Academic Press, London
Kim MH, Im SH, Park OO (2005) Rapid fabrication of two- and three- dimensional colloidal crystal films via confined convective assembly. Adv Funct Mater 15:1329–1335. doi:10.1002/adfm.200400602
Kodama H, Momose S, Sugimoto T, Uzumaki T, Tanaka A (2005) Chemically synthesized FePt nanoparticle material for ultrahigh-density recording. IEEE Trans Magn 41:665–669. doi:10.1109/TMAG.2004.838050
Kolliopoulou S, Dimitrakis P, Normand P, Zhang H, Cant N, Evans SD et al (2003) Hybrid silicon-organic nanoparticle memory device. J Appl Phys 94:5234–5239. doi:10.1063/1.1604962
Kralchevsky PA, Nagayama K (1994) Capillary force between colloidal particles. Langmuir 10:23–36. doi:10.1021/la00013a004
Kralchevsky PA, Paunov VN, Ivanov IB, Nagayama K (1992) Capillary meniscus interaction between colloidal particles attached to a liquid-fluid interface. J Colloid Interface Sci 151:79–94. doi:10.1016/0021-9797(92)90239-I
Linford M, Chidsey C (1993) Alkyl monolayers covalently bonded to silicon surface. J Am Chem Soc 115:12631–12632. doi:10.1021/ja00079a071
Masel RI (1996) Principles of adsorption and reaction on solid surfaces. John Wiley & Sons, New York
Motte L, Lacaze E, Maillard M, Plieni MP (2000) Self-assemblies of silver sulfide nanocrystals on various substrates. Langmuir 16:3803–3812. doi:10.1021/la9908283
Murray CB, Kagan CR, Bawendi MG (2000) Synthesis and charaterization of monodisperse nanocrystals and close-packed nanocrystal assemblies. Annu Rev Mater Sci 30:545–610. doi:10.1146/annurev.matsci.30.1.545
Murray CB, Norris DJ, Bawendi MG (1993) Synthesis and characterization of nearly monodisperse CdE (E = S, Se, Te) semiconductor nanocrystallites. J Am Chem Soc 115:8706–8715. doi:10.1021/ja00072a025
Murray CB, Sun S, Gaschler W, Doyle H, Betley TA, Kagan CR (2001) Colloidal synthesis of nanocrystals and nanocrystal superlattices. IBM J Res Develop 45:47–56
Nalwa HS (2000) Handbook of nanostructured materials and nanotechnology. Academic Press, San Diego
Oertel DC, Bawendi MG, Arange AC, Bulovic V (2005) Photodetectors based on treated CdSe quantum-dot films. Appl Phys Lett 87:213505. doi:10.1063/1.2136227
Onoda GY, Linger EG (1986) Experimental determination of the random-parking limit in two dimensions. Phys Rev A 33:715–716. doi:10.1103/PhysRevA.33.715
Park J, An K, Hwang Y, Park J, Noh H, Kim J et al (2004) Ultra-large scale synthesis of monodisperse nanocrystals. Nat Mater 3:891–895. doi:10.1038/nmat1251
Prevo BG, Velev OD (2004) Controlled, rapid deposition of structured coatings from micro- and nanoparticle suspension. Langmuir 20:2099–2107. doi:10.1021/la035295j
Stechel JS, Coe S, Bulovic V, Bawendi MG (2003) 1.3 μm to 1.55 μm tunable electrouminescence from PbSe quantum dots embedded within an organic device. Adv Mater 15:1862–1866. doi:10.1002/adma.200305449
Sun S, Murray CB (1999) Synthesis of monodisperse cobalt nanocrystals and their assembly into magnetic superlattices. J Appl Phys 85:4325–4330. doi:10.1063/1.370357
Sun S, Murray CB, Wellder D, Folks L, Moser A (2000) Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices. Science 287:1989–1992. doi:10.1126/science.287.5460.1989
Sun S, Anders S, Hamann H, Thiele J, Baglin J, Thomson T et al (2002) Polymer mediated self-assembly of magnetic nanoparticles. J Am Chem Soc 124:2884–2885. doi:10.1021/ja0176503
Tilley RD, Saito S (2003) Preparation of large scale monolayers of gold nanoparticles on modified silicon substrates using a controlle pulling method. Langmuir 19:5115–5120. doi:10.1021/la026993r
Ulman A (1996) Formation and structure of self-assembled monolayers. Chem Rev 96:1533–1544. doi:10.1021/cr9502357
Yin Y, Alivisatos AP (2005) Colloidal nanocrystal synthesis and the organic-inorganic interface. Nature 437:664–670. doi:10.1038/nature04165
Yoon TS, Oh J, Park SH, Kim V, Jung BG, Min SH et al (2004) Single and multiple-step dip-coating of colloidal maghemite (γ-Fe2O3) nanoparticles onto Si, Si3N4 and SiO2 substrates. Adv Funct Mater 14:1062–1068. doi:10.1002/adfm.200305088
Acknowledgment
This work was supported by the National Core Research Center program of the Korea Science and Engineering Foundation (KOSEF) through the NANO Systems Institute at Seoul National University.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kwon, CW., Yoon, TS., Yim, SS. et al. The effect of excess surfactants on the adsorption of iron oxide nanoparticles during a dip-coating process. J Nanopart Res 11, 831–839 (2009). https://doi.org/10.1007/s11051-008-9451-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11051-008-9451-7