Probing Polymer Material Properties on the Nanometer Scale

2010 ◽  
Vol 18 (6) ◽  
pp. 22-27
Author(s):  
U. Schmidt ◽  
W. Ibach ◽  
O. Hollricher
Keyword(s):  
Materials Science ◽  
Chemical Properties ◽  
Separation Process ◽  
Nanometer Scale ◽  
Physical And Chemical Properties ◽  
Good Spatial Resolution ◽  
Phase Separation Process ◽  
Solvent Washing ◽  
Physical And Chemical ◽  
And Chemical Properties

Polymers play an essential role in modern materials science. Because of the wide variety of mechanical and chemical properties of polymers, they are used in nearly every industry. Knowledge about their physical and chemical properties on the nanometer scale is often required. However, some details about the phase-separation process in polymers are difficult to study with conventional characterization techniques because these methods cannot chemically differentiate phases with good spatial resolution without damage, staining, or preferential solvent washing.

CARBON CAGES WITH NANOSPACE INSIDE: FULLERENES TO NANOCAPSULES

1996 ◽  
Vol 03 (01) ◽  
pp. 819-825 ◽  
Author(s):  
YAHACHI SAITO
Keyword(s):  
Metal Atom ◽  
Chemical Properties ◽  
Nanometer Scale ◽  
Graphene Sheets ◽  
Physical And Chemical Properties ◽  
Hollow Structures ◽  
Foreign Materials ◽  
Physical And Chemical ◽  
And Chemical Properties

The arc-vaporization method is now widely used for the formation of fullerenes and related materials. One of the remarkable properties of fullerenes and related materials is that they have hollow structures with a cavity of nanometer-scale diameter; outer cages are made up of single or concentric multilayers of graphene sheets. When foreign materials, such as metal atom(s) or nanocrystallite, are trapped in the inner cavity, unusual physical and chemical properties are expected to be brought about. Attempts to place atoms, clusters, and nanocrystals are reviewed.

NANOELECTRONICS – OPPORTUNITIES AND CHALLENGES

2006 ◽  
Vol 16 (01) ◽  
pp. 83-94 ◽  
Author(s):  
H.-S. PHILIP WONG
Keyword(s):  
Materials Science ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
System Architectures ◽  
Good Science ◽  
Engineering Community ◽  
Performance Benchmarking ◽  
Physical And Chemical ◽  
Future Work ◽  
And Chemical Properties

As device sizes approach the nanoscale, new opportunities arise from harnessing the physical and chemical properties at the nanoscale. It is now feasible to contemplate new nanoelectronic systems based on new devices with completely new system architectures. This paper will give an overview of the materials, technology, and device opportunities in the nanoscale era. So far, much of the nanoscale sciences have been researched in the physics, chemistry, and materials science communities. While there have been plenty of good science in the nano world, nanotechnology is still at its infancy. The engineering community is poised to make a major impact in transforming good nanoscience into useful nanotechnology. The disciplined performance benchmarking against alternatives as practiced by the engineering community will prove to be invaluable to the development of new nanotechnologies. Examples of such performance benchmarking exercises will be shown and directions for future work will be suggested.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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