Electric-field-induced self-assembled one-dimensional nanostructures in CdX and HgX (X=Se, Te) thin films

Cadmium sulfide (CdS) and zinc sulfide (ZnS) nanostructures were formed by means of electrophoretic deposition of nanoparticles with mean diameter of 6 nm and 20 nm, respectively. Nanoparticles were prepared by a microwave assisted synthesis in aqueous dispersion and electrophoretically deposited on aluminum plates. CdS thin films and ZnS one-dimensional nanostructures were grown on the negative electrodes after 24 hours of electrophoretic deposition at direct current voltage. CdS and ZnS nanostructures were characterized by means of scanning electron (SEM) and atomic force (AFM) microscopies analysis. CdS thin films homogeneity can be tunable varying the strength of the applied electric field. Deposition at low electric field produces thin films with particles aggregates, whereas deposition at relative high electric field produces smoothed thin films. The one-dimensional nanostructure size can be also controlled by the electric field strength. Two different mechanisms are considered in order to describe the formation of the nanostructures: lyosphere distortion and thinning and subsequent dipole-dipole interactions phenomena are proposed as a possible mechanism of the one-dimensional nanostructures, and a mechanism considering pre-deposition interactions of the CdS nanoparticles is proposed for the CdS thin films formation.

Download Full-text

Second Order Nonlinear Optical Thin Films Fabricated from Electric Field-Assisted Electrostatic Self-Assembled Monolayer Method

MRS Proceedings ◽

10.1557/proc-561-29 ◽

1999 ◽

Vol 561 ◽

Author(s):

Y. Liu ◽

R.O. Claus ◽

D. Marciu ◽

C. Figura ◽

J.R. Heflin

Keyword(s):

Thin Films ◽

Electric Field ◽

Nonlinear Optical ◽

Second Harmonic ◽

New Method ◽

Multilayer Thin Films ◽

Self Assembled Monolayer ◽

Harmonic Intensity ◽

Self Assembled ◽

First Time

ABSTRACTA new method for the build-up of non-centrosymmetric multilayer thin films has been developed for the first time using an electric field-assisted electrostatic self-assembled monolayer (EF-ESAM) technique. An increase by 116% of the second-harmonic intensity of the films has been observed in comparison with that of ESAM film.

Download Full-text

Electric Field Guided Assembly of One-Dimensional Nanostructures for High Performance Sensors

Sensors ◽

10.3390/s120505725 ◽

2012 ◽

Vol 12 (5) ◽

pp. 5725-5751 ◽

Cited By ~ 22

Author(s):

Devon A. Brown ◽

Jong-Hoon Kim ◽

Hyun-Boo Lee ◽

Gareth Fotouhi ◽

Kyong-Hoon Lee ◽

...

Keyword(s):

Electric Field ◽

High Performance ◽

One Dimensional ◽

Guided Assembly ◽

One Dimensional Nanostructures

Download Full-text

Anisotropic optical properties of large-scale aligned silver nanowire films via controlled coffee ring effects

RSC Advances ◽

10.1039/c5ra04214c ◽

2015 ◽

Vol 5 (49) ◽

pp. 39103-39109 ◽

Cited By ~ 20

Author(s):

Weiping Zhou ◽

Anming Hu ◽

Shi Bai ◽

Ying Ma ◽

Denzel Bridges

Keyword(s):

Thin Films ◽

Optical Properties ◽

Physical Properties ◽

High Performance ◽

Large Scale ◽

Silver Nanowire ◽

Electromechanical Systems ◽

One Dimensional ◽

Coffee Ring ◽

One Dimensional Nanostructures

Preparation of thin films with one-dimensional nanostructures and unique physical properties for high-performance electronic, optoelectronic, and electromechanical systems.

Download Full-text

Diffraction Equation for One-Dimensional Gratings Self-Assembled by Banana-Shaped Liquid Crystals

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.428-429.255 ◽

2010 ◽

Vol 428-429 ◽

pp. 255-258

Author(s):

Bao Gai Zhai ◽

Yuan Ming Huang

Keyword(s):

Thin Films ◽

Refractive Index ◽

Liquid Crystals ◽

Diffraction Gratings ◽

Periodic Modulation ◽

One Dimensional ◽

Self Assembled ◽

Diffraction Patterns

Banana-shaped liquid crystals can self-assemble themselves into one kind of thin films in which periodic modulation of the refractive index can be developed. When a beam of light is shone onto the thin films, diffraction patterns can be formed. In this work, the diffraction equation is derived for one-dimensional diffraction gratings formed by banana-shaped liquid crystals.

Download Full-text