Triethoxysilyl functionalized hyperbranched polsiloxysilanes at the focal (FT-HBPSs) and terminal (TT-HBPSs) positions were synthesized to investigate adsorption behavior onto a silicon wafer surface. The surface of the silicon wafer adsorbed with the HBPSs was characterized by X-ray photoelectron spectroscopy, atomic force microscopy (AFM), static and dynamic water contact angle measurements. The AFM images indicated the formation size of dot-like structures were approximately 200 nm. The presence of vinyl terminal groups of FT-HBPSs permitted conversion of the surface from a non-polar hydrocarbon to a polar hydroxylated or carboxylated structures. After the polarity was changed, the surface properties were also studied using the above surface analysis techniques. The dynamic contact angle measurement indicated that the silicon wafer surface modified by FT-HBPSs was more hydrophilic in water than TT-HBPS. This behavior can be explained by the difference of connecting points between HBPS and the silicon wafer surface.
FloryP.J. (1952). Molecular Size Distribution in Three Dimensional Polymers. VI. Branched Polymers Containing A-R-Bf-1 Type Units, J. Am. Chem. Soc., 74: 2718–2723.
2.
GaoC., and YanD. (2004). Hyperbranched Polymers: from Synthesis to Applications, Prog. Polym. Sci., 29: 183–275.
3.
TurnerS.R., VoitB.I., and MoureyT.H. (1993). All-Aromatic Hyperbranched Polyesters with Phenol and Acetate End Groups: Synthesis and Characterization, Macromolecules, 26: 4617–4623.
4.
DerouetD., SylvieF., and Jean-ClaudeB. (1998). Synthesis of Alkoxysilyl-Terminated Polyisoprenes by Means of “Living” Anionic Polymerization, 1. Modeling of the Termination Step by Studying the Reaction of Butyllithium with Various Alkoxysilane Reagents, Macromol. Chem. Phys., 199: 1835–1842.
5.
DerouetD., SylvieF., and Claude-JeanB. (1999). Synthesis of Alkoxysilyl-Terminated Polyisoprenes by Means of 'Living, Anionic Polymerization' 2. Synthesis of Trialkoxysilyl-Terminated 1'4-polyisoprenes by Reaction of Polyisoprenyllithium with Various Functional Trialkoxysilanes Selected as End-Capping Reagents, Macromol. Chem. Phys., 200: 10–24.
6.
KalpanaV., TimothyE.L., and ThomasC.W. (2005). Silicon Surface Modification with Trialkoxysilyl-functionalized Star-shaped Polymers, J. Polym. Sci. Part A Polym. Chem., 43: 3655–3666.
7.
KimK.M., JikeiM., and KakimotoM. (2002). Synthesis and Properties of Amphiphilic Hyperbranched Poly(dimethylsiloxane) Possessing Hydrophilic Terminal Group, Polymer J ., 34: 755–760.
8.
KimK.M., JikeiM., and KakimotoM. (2002). Preparation and Properties of Novel Hyperbranched Poly(dimethylsiloxane)s, Polymer J ., 34: 275–279.
MiravetJ.F., and FréchetJ.M.J. (1998). New Hyperbranched Poly(siloxysilanes): Variation of the Branching Pattern and End-Functionalization, Macromolecules, 31: 3461–3468.
11.
MoriH., BökerA., KrauschG., and MüllerA.H.E. (2001). Surface-Grafted Hyperbranched Polymers via Self-Condensing Atom Transfer Radical Polymerization from Silicon Surfaces, Macromolecules, 34: 6871–6882.
12.
HierlmannA., CampbellJ.K., BarkerL.A., CrooksR.M., and RiccoA.J. (1998). Structural Distortion of Dendrimers on Gold Surfaces: A Tapping-Mode AFM Investigation, J. Am. Chem. Soc., 120: 5323–5324.
13.
FréchetJ.M.J., and HawkerC.J. (1995). Hyperbranched Polyphenylene and Hyperbranched Polyesters: New Soluble, Three-Dimensional, Reactive Polymers, React. Funct. Polym., 26: 127–136.
14.
TurnerS.R., WalterF., VoitB.I., and MoureyT.H. (1994). Hyperbranched Aromatic Polyesters with Carboxylic Acid Terminal Groups, Macromolecules, 27: 1611–1616.
15.
HawkerC.J., MalmströmE.E., FrankC.W., and KampfJ.P. (1997). Exact Linear Analogs of Dendritic Polyether Macromolecules: Design, Synthesis, and Unique Properties, J. Am. Chem. Soc., 119: 9903–9904.
16.
VoitB. (2000). New Developments in Hyperbranched Polymers, J. Polym. Sci., Part A, Polym. Chem., 38: 2505–2525.
17.
TomaliaD.A., NaylorA.M., and GoddardW.A. (1990). Starburst Dendrimers: Molecular-Level Control of Size, Shape, Surface Chemistry, Topology, and Flexibility from Atoms to Macroscopic Matter, Angew. Chem. Intl. Ed. Engl., 29: 138–175.
18.
VoitB.I. (1995). Dendritic Polymers: From Aesthetic Macromolecules to Commercially Interesting Materials, Acta. Polym., 46: 87–99.
19.
HultA., JohansonM., and MalmströmE. (1995). Dendritic Resins for Coating Applications, Macromol. Symp., 98: 1159–1161.
20.
MalmströmE., and HultA.J. (1997). Dendritic Molecules, J. Macromol. Sci. Rev. Macromol. Chem. Phys., C37: 555–579.
21.
MathiasL.J., and CarothersT.W. (1991). Hyperbranched poly(siloxysilanes), J. Am. Chem. Soc., 113: 4043–4044.
22.
SeinoM., YokomachiK., HayakawaT., KikuchiR., KakimotoM., and HoriuchiS. (2006). Preparation of Poly(N-isopropylacrylamide) Grafted Silica Bead Using Hyperbranched Polysiloxysilane as Polymer Brush and Application to Temperature-responsive HPLC, Polymer, 47: 1946–1952.
23.
NogamiK., KakimotoM., HayakawaT., YokomachiY., SeinoM., and SakamotoK. (2006). Modification of Anodized Aluminum Film by Hyperbranched Poly(siloxysilane)s in Conductive Polymer Aluminum Solid Electrolytic Capacitor, Chem. Lett., 35: 134–135.
