Apparatus, system, and method for guided growth of patterned media using monodisperse nanospheres
View Patent ↗An apparatus, system, and method are disclosed for guided growth of patterned media using monodisperse nanospheres. The apparatus includes nanoscale features extending from a substrate. The nanoscale features may be formed using electron-beam lithography and have a non-uniform cap. A spherical cap is formed on the non-uniform cap by hydrolysis and precipitation of monodisperse nanospheres on an immobilized nucleation site, the immobilized nucleation site attached with one end of the nanoscale feature. The system includes the apparatus and further includes monodisperse nanospheres formed of silicon dioxide spheres. The method includes providing a substrate, etching at least one nanoscale feature extending from the substrate, the feature formed using electron-beam lithography and having a non-uniform cap, forming an immobilized nucleation site, and forming a spherical cap by hydrolysis and precipitation of monodisperse nanospheres on the immobilized nucleation site, the immobilized nucleation site attached with one end of the nanoscale feature.
1. An apparatus for imprinting patterned recording media, the apparatus comprising:
a substrate;
at least one nanoscale feature extending from the substrate;
a non-uniform cap formed on the at least one nanoscale feature, the non-uniform cap comprising a non-uniform surface, wherein the non-uniform surface of the non-uniform cap comprises an immobilized nucleation site; and
a spherical cap comprising monodisperse nanospheres formed on the immobilized nucleation site, the immobilized nucleation site disposed between the nanoscale feature and the spherical cap.
2. The apparatus of claim 1 , wherein the monodisperse nanospheres comprise silicon dioxide spheres.
3. The apparatus of claim 1 , further comprising a secondary patterned substrate comprising a flexible acrylate imprinting apparatus.
4. The apparatus of claim 3 , wherein the secondary patterned substrate is a replica of the apparatus and transmits UV light into a UV-curable liquid resist on a surface of a disk substrate.
5. A system for imprinting patterned recording media, the system comprising:
a substrate;
at least one nanoscale feature extending from the substrate;
a non-uniform cap formed on the at least one nanoscale feature, the non-uniform cap comprising a non-uniform surface, wherein the non-uniform surface of the non-uniform cap comprises an immobilized nucleation site; and
a spherical cap comprising monodisperse nanospheres formed on the immobilized nucleation site, the immobilized nucleation site disposed between the nanoscale feature and the spherical cap; and
wherein the monodisperse nanospheres comprise silicon dioxide spheres.
6. The system of claim 5 , further comprising a secondary patterned substrate comprising a flexible acrylate imprinting apparatus.
7. The system of claim 6 , wherein the secondary patterned substrate is a replica of the apparatus and configured to transmit UV light into a UV-curable liquid resist on a surface of a disk substrate.
8. An apparatus for imprinting patterned recording media formed by the process comprising:
providing a substrate;
etching, using electron-beam lithography, at least one nanoscale feature extending from the substrate and a non-uniform cap on the at least one nanoscale feature, the non-uniform cap comprising a non-uniform surface;
forming an immobilized nucleation site on the non-uniform surface; and
forming a spherical cap comprising monodisperse nanospheres by hydrolysis and precipitation of the monodisperse nanospheres on the immobilized nucleation site, the immobilized nucleation site disposed between the nanoscale feature and the spherical cap.
9. The apparatus of claim 8 , wherein forming the monodisperse nanospheres further comprises hydrolysis of tetraethyl orthosilicate (TEOS).
10. The apparatus of claim 9 , further comprising controlled addition of TEOS to a solution of about 2M NH 3 and 6M H 2 O.
11. The apparatus of claim 9 , further comprising maintaining the pH of the solution in the range of between about 8 and 13.
12. The apparatus of claim 9 , further comprising maintaining the temperature of the solution in the range of between about 20 degrees C. and 80 degrees C.
13. The apparatus of claim 8 , further comprising forming a secondary patterned substrate comprising a flexible acrylate imprinting apparatus.
14. The apparatus of claim 13 , further comprising transmitting UV light into a UV-curable liquid resist on a surface of a disk substrate.