Double textured cylindrical block copolymer domains via directional solidification on a topographically patterned substrate

Park, Cheolmin; Cheng, Joy Y.; Fasolka, Michael J.; Mayes, Anne M.; Ross, C. A.; Thomas, Edwin L.; De Rosa, Claudio
August 2001
Applied Physics Letters;8/6/2001, Vol. 79 Issue 6
Academic Journal
Directional solidification of cylinder forming block copolymer films confined between a directionally crystallizing solvent (benzoic acid) and a topographically patterned silicon substrate imparts a particular orientation to the block copolymer microdomains that is dependent of the solidification direction and the local film thickness. The substrate features (30 nm high, 2μm wide square mesas on a 4μm sq lattice) shape the film morphology by periodically modulating the local film thickness. Thicker regions between substrate features (plateaus) exhibit in-plane cylinders aligned in the crystallization direction and thinner regions over the substrate features (mesas) display vertically aligned cylindrical domains. This approach is a simple and general technique for engineering an intended domain orientation in specific areas of a block copolymer film. Development of this method for nanolithographic applications is demonstrated through oxygen plasma reactive ion etching of the patterned cylindrical domains. © 2001 American Institute of Physics.


Related Articles

  • Microdomain patters from directional eutectic solidification and epitaxy. De Rosa, Claudio; Park, Cheolmin; Thomas, Edwin L.; Lotz, Bernard // Nature;5/25/2000, Vol. 405 Issue 6785, p433 

    Describes a quick process which leads the formation of two-dimensional periodic thin films having large area and uniform thickness with vertically aligned cylindrical domains containing precisely one crystalline lamella. Process, which involves rapid solidification of a semicrystalline block...

  • Rheology of Self-Assembling Silk Fibroin Solutions. Zhou, Rui; Chen, Song-Bi; Yuan, Xue-Feng // AIP Conference Proceedings;7/7/2008, Vol. 1027 Issue 1, p321 

    A robust procedure for preparation of aqueous silk fibroin solutions with a range of concentration up to 25 wt% from domestic Bombyx mori cocoon shells has been established. We have carried out molecular and rheometric characterizations of silk fibroin solutions, and constructed an equilibrium...

  • Monodisperse cylindrical micelles by crystallization-driven living self-assembly. Gilroy, Joe B.; Gädt, Torben; Whittell, George R.; Chabanne, Laurent; Mitchels, John M.; Richardson, Robert M.; Winnik, Mitchell A.; Manners, Ian // Nature Chemistry;Jul2010, Vol. 2 Issue 7, p566 

    Non-spherical nanostructures derived from soft matter and with uniform size—that is, monodisperse materials—are of particular utility and interest, but are very rare outside the biological domain. We report the controlled formation of highly monodisperse cylindrical block copolymer...

  • Polymer in bulk.  // Professional Engineering;09/02/98, Vol. 11 Issue 16, p44 

    States that cycloolefin copolymer (COC) will be manufactured in bulk for the first time from the middle of year 2000. Identification of property combinations which COC claims to have; Description of COC; Information on the make-up of COC; Applications which the COCs can be used for.

  • New acetals take hard knocks.  // Plastics Technology;Mar97, Vol. 43 Issue 3, p50 

    Reports on the introduction of two extra-grades of Celcon acetal copolymer by Hoescst Technical Polymers. Features of grades.

  • The Effect of Concentrational Supercooling on the Morphological Stability of Self-Similar Solidification with a Planar Front. Alexandrov, D. V. // Doklady Physics;Jul2001, Vol. 46 Issue 7, p453 

    Examines the effect of concentrational supercooling on the morphological stability of self-similar solidification with a planar front. Rates of thermal conductivity and impurity diffusion; Condition of balance for heat and mass; Distributions of temperature and impurity concentration.

  • Control of grain alignment to fabricate long Y-Ba-Cu-O superconductors with high current density. Selvamanickam, V.; Partsinevelos, C. // Applied Physics Letters;6/29/1992, Vol. 60 Issue 26, p3313 

    Evaluates the uniformity of grain alignment in the production of yttrium-barium-copper-oxide (YBCO) superconductors with high current density. Use of directional solidification method in growing YBCO samples; Analysis of x-ray pole figures; Determination of the deviations of aligned planes.

  • Direct observation of resolidification from the surface upon pulsed-laser melting of amorphous silicon. Bruines, J. J. P.; van Hal, R. P. M.; Boots, H. M. J.; Sinke, W.; Saris, F. W. // Applied Physics Letters;5/12/1986, Vol. 48 Issue 19, p1252 

    Amorphized Si has been irradiated using a 7.5-ns frequency-doubled neodymium:yttrium aluminum garnet laser. For low energy density pulses, time-resolved reflectivity measurements and Rutherford backscattering spectrometry of Cu implantation profiles show that the melted layer solidifies from the...

  • On the origin of recalescence in amorphous Ge films melted with nanosecond laser pulses. Vega, F.; Afonso, C.N.; Szyszko, W.; Solis, J. // Journal of Applied Physics;9/1/1997, Vol. 82 Issue 5, p2247 

    Studies rapid solidification phenomena in amorphous germanium films on silicon substrates by means of real time reflectivity measurements performed during irradiation with nanosecond laser pulses. Influence of the thermal response of the film/substrate system; Reamorphization upon solidification.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics