Manipulation of absorption in Si thin films with ordered nanostructures

2010 ◽  
Vol 8 (3) ◽  
pp. 839-842
Author(s):  
Yalin Lu ◽  
Kitt Reinhardt
Keyword(s):  
Thin Films ◽  
Ordered Nanostructures

Arrays of ordered nanostructures in Fe-Pt thin films by self-assembling of polystyrene nanospheres

2013 ◽  
Vol 113 (17) ◽  
pp. 17B516 ◽  
Author(s):  
Paola Tiberto ◽  
Gabriele Barrera ◽  
Luca Boarino ◽  
Federica Celegato ◽  
Marco Coïsson ◽  
...  
Keyword(s):  
Thin Films ◽  
Self Assembling ◽  
Polystyrene Nanospheres ◽  
Ordered Nanostructures

Study Morphology Transitions in Self-Assembled Triblock Copolymer Thin Films with Nanostructures by AFM

2006 ◽  
Vol 532-533 ◽  
pp. 165-168
Author(s):  
Yong Zhi Cao ◽  
Shen Dong ◽  
Ying Chun Liang ◽  
Tao Sun
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Triblock Copolymer ◽  
Low Cost ◽  
Orientational Order ◽  
Solvent Annealing ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ordered Nanostructures ◽  
Self Assembled

As a “bottom-up” approach to nanostructures for nanofabrication, self-assembled block copolymer thin films have received much attention not only thanks to the scale of the microdomains but also due to the convenient shape tunability. In order to realize applications of self-assembled block copolymer thin films in nanotechnologies, control over microdomain spatial and orientational order is paramount. In this paper, using atomic force microscopy (AFM), we studied systemically nanostructure transitions induced by post-solvent annealing in self-assembled block copolymer thin films. Furthermore, a variety of thin films with well-ordered nanostructures, which can be employed as templates for nanotechnologies, have been realized simply and at low cost.

scholarly journals Preparation of long-range ordered nanostructures in semicrystalline diblock copolymer thin films using micromolding

2014 ◽  
Vol 32 (9) ◽  
pp. 1188-1198 ◽  
Author(s):  
Peng Zhang ◽  
Hai-ying Huang ◽  
Yu Chen ◽  
Shun Yu ◽  
Christina Krywka ◽  
...  
Keyword(s):  
Thin Films ◽  
Long Range ◽  
Diblock Copolymer ◽  
Ordered Nanostructures

Rapid solvo-microwave annealing for optimizing ordered nanostructures and crystallization of regioregular polythiophene-based block copolymers

2019 ◽  
Vol 10 (36) ◽  
pp. 4962-4972 ◽  
Author(s):  
Junghun Han ◽  
Jin-Seong Kim ◽  
Jae Man Shin ◽  
Hongseok Yun ◽  
Youngkwon Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymers ◽  
Processing Time ◽  
Ordered Structures ◽  
High Crystallinity ◽  
Microwave Annealing ◽  
Short Processing Time ◽  
Ordered Nanostructures

Solvo-microwave annealing is an effective method for producing thin films of polythiophene-based block copolymers with ordered structures and high crystallinity in a very short processing time (∼3 min).

scholarly journals Ordered nanostructures on La-Sr-Cu-O thin films deposited by pulsed electron beam technique

2005 ◽  
Vol 54 (6) ◽  
pp. 2843
Author(s):  
Chen Lei-Ming ◽  
Li Pei-Gang ◽  
Fu Xiu-Li ◽  
Zhang Hai-Ying ◽  
Li Ling-Hong ◽  
...  
Keyword(s):  
Thin Films ◽  
Electron Beam ◽  
Pulsed Electron Beam ◽  
Ordered Nanostructures ◽  
Beam Technique

The study of interfacial reactions of nickel thin films on GaAs

1983 ◽  
Vol 41 ◽  
pp. 156-157
Author(s):  
L.J. Chen ◽  
Y.F. Hsieh
Keyword(s):  
Thin Films ◽  
Integrated Circuits ◽  
Interfacial Reactions ◽  
Metal Contacts ◽  
Nickel Thin Films ◽  
Thin Foils ◽  
The Status ◽  
Si Doped ◽  
Electron Microscopes

One measure of the maturity of a device technology is the ease and reliability of applying contact metallurgy. Compared to metal contact of silicon, the status of GaAs metallization is still at its primitive stage. With the advent of GaAs MESFET and integrated circuits, very stringent requirements were placed on their metal contacts. During the past few years, extensive researches have been conducted in the area of Au-Ge-Ni in order to lower contact resistances and improve uniformity. In this paper, we report the results of TEM study of interfacial reactions between Ni and GaAs as part of the attempt to understand the role of nickel in Au-Ge-Ni contact of GaAs.N-type, Si-doped, (001) oriented GaAs wafers, 15 mil in thickness, were grown by gradient-freeze method. Nickel thin films, 300Å in thickness, were e-gun deposited on GaAs wafers. The samples were then annealed in dry N2 in a 3-zone diffusion furnace at temperatures 200°C - 600°C for 5-180 minutes. Thin foils for TEM examinations were prepared by chemical polishing from the GaA.s side. TEM investigations were performed with JE0L- 100B and JE0L-200CX electron microscopes.

Studies on Water in the Hydration Chamber of a Modified Electron Microscope

1970 ◽  
Vol 28 ◽  
pp. 544-545
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electron Microscope ◽  
Steady State ◽  
Room Temperature ◽  
Small Mass ◽  
Equilibrium Pressure ◽  
Biological Objects ◽  
Mechanical Pump ◽  
Differential Pumping

Use of the electron microscope to examine wet objects is possible due to the small mass thickness of the equilibrium pressure of water vapor at room temperature. Previous attempts to examine hydrated biological objects and water itself used a chamber consisting of two small apertures sealed by two thin films. Extensive work in our laboratory showed that such films have an 80% failure rate when wet. Using the principle of differential pumping of the microscope column, we can use open apertures in place of thin film windows.Fig. 1 shows the modified Siemens la specimen chamber with the connections to the water supply and the auxiliary pumping station. A mechanical pump is connected to the vapor supply via a 100μ aperture to maintain steady-state conditions.

Nucleation and Early Growth of Sputtered thin Films

1970 ◽  
Vol 28 ◽  
pp. 516-517
Author(s):  
Dudley M. Sherman ◽  
Thos. E. Hutchinson
Keyword(s):  
Thin Films ◽  
Electron Beam ◽  
Ion Beam ◽  
Ion Source ◽  
Water Cooling ◽  
Stages Of Growth ◽  
Lens Assembly ◽  
Microscope Technique ◽  
Ion Beam Sputter Deposition

The in situ electron microscope technique has been shown to be a powerful method for investigating the nucleation and growth of thin films formed by vacuum vapor deposition. The nucleation and early stages of growth of metal deposits formed by ion beam sputter-deposition are now being studied by the in situ technique.A duoplasmatron ion source and lens assembly has been attached to one side of the universal chamber of an RCA EMU-4 microscope and a sputtering target inserted into the chamber from the opposite side. The material to be deposited, in disc form, is bonded to the end of an electrically isolated copper rod that has provisions for target water cooling. The ion beam is normal to the microscope electron beam and the target is placed adjacent to the electron beam above the specimen hot stage, as shown in Figure 1.

Macromolecular structures of biological specimens are not obscured by controlled osmium impregnation

1983 ◽  
Vol 41 ◽  
pp. 606-607
Author(s):  
Klaus-Ruediger Peters ◽  
Samuel A. Green
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Critical Point ◽  
Metal Films ◽  
High Magnification ◽  
Osmium Impregnation ◽  
Instrumental Resolution ◽  
20 Nm ◽  
Continuous Metal

High magnification imaging of macromolecules on metal coated biological specimens is limited only by wet preparation procedures since recently obtained instrumental resolution allows visualization of topographic structures as smal l as 1-2 nm. Details of such dimensions may be visualized if continuous metal films with a thickness of 2 nm or less are applied. Such thin films give sufficient contrast in TEM as well as in SEM (SE-I image mode). The requisite increase in electrical conductivity for SEM of biological specimens is achieved through the use of ligand mediated wet osmiuum impregnation of the specimen before critical point (CP) drying. A commonly used ligand is thiocarbohvdrazide (TCH), first introduced to TEM for en block staining of lipids and glvcomacromolecules with osmium black. Now TCH is also used for SEM. However, after ligand mediated osinification nonspecific osmium black precipitates were often found obscuring surface details with large diffuse aggregates or with dense particular deposits, 2-20 nm in size. Thus, only low magnification work was considered possible after TCH appl ication.

Sign in / Sign up

Export Citation Format

Share Document