Micro- and Nanopatterned Copper Structures Using Directed Self-Assembly on Templates Fabricated from Phase-Separated Mixed Langmuir−Blodgett Films

Abstract

We report a versatile method to confine metal thin films in micro- and nanopatterns using directed self-assembly on the templates fabricated from phase-separated mixed Langmuir-Blodgett (LB) films. The pattern of the mixed LB films can be tuned by adjusting intermolecular interaction between the film-forming molecules in the LB films and by varying the fabrication conditions of the films such as the mixing ratio, subphase temperature, and surface pressure. We use the patterned LB films for templates to confine metal in patterned regions, taking advantage of the difference between the surface free energy of the patterned regions and that of the self-assembled monolayer of the silane coupling agent. Au nanoparticles are confined onto the patterned films as a catalyst for the succeeding Cu electroless deposition. The atomic force microscopic images, Auger electron spectra, and scanning Auger electron maps of a Cu-deposited film show that Cu is selectively deposited on the patterns of phase separation of the original mixed LB films.

Lithography of Self-assembled Semiconductor Quantum Dots on Templates Fabricated from Mixed Langmuir-Blodgett Films

“…Figure 3 c shows an AFM image of the APS-modifi ed template. The height of the disk domains is smaller than the height of the surrounding regions by 0.5 nm, indicating the formation of a monolayer of APS in the disk domain regions 25,26 . Sections d and e in Fig.…”

“…We fabricated fi lms consisting of functional materials such as copper 25 We then performed a selective immobilization of the semiconductor quantum dots of CdS-NPs on these templates using a liquid phase adsorption technique. Figure 3 a shows an AFM image of a mixed LB fi lm of H19A/F8H2SiOMe 3/7.…”

“…Disk, spiral, and nanowire domains form in mixed LB fi lms consisting of amphiphilic carboxylic acids and silane-coupling agents 20,24 , and templates can be fabricated using these mixed LB films. We have successfully patterned Cu 25 , gold nanoparticles 26 , organic dyes 27 , silica nanoparticles 28 , titania, and zirconia fi lms 29 .…”

Organização supramolecular da ftalocianina de cobalto(II) e seu efeito na oxidação do aminoácido cisteína

“…[1][2][3] Pode-se citar a técnica Langmuir-Blodgett (LB), onde camadas moleculares são preparadas em ambientes com elevado controle molecular. 1,[4][5][6] Nos filmes LB, as estruturas são extremamente organizadas e podem interagir fortemente com um substrato sólido (vidro, quartzo, silício, ouro etc). Uma vez controlados os parâmetros de deposição, diversas estruturas podem ser idealizadas através da deposição de multicamadas de vários compostos, 1,4 como biomoléculas, complexos de coordenação, polímeros sintéticos e condutores, cristais líquidos poliméricos, entre outros.…”

Interaction of Fe3+meso-tetrakis (2,6-dichloro-3-sulfonatophenyl) porphyrin with cationic bilayers: magnetic switching of the porphyrin and magnetic induction at the interface

“…Supramolecular chemistry allows for tremendous possibilities to produce different molecular architectures such as the ultra-fine films, especially hybrid nanoarchitectures, which are held together by non-covalent forces and interactions [41][42][43]. By using strategies such as the promising layer-by-layer deposition technique (LbL films), different compounds can be assembled into nanodevices [44][45][46]. An equally promising strategy related to the use of porphyrins is the induced magnetization of these molecules (spin polarization).…”