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Related Concept Videos

Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Crystal Growth: Principles of Crystallization01:25

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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
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Crystal Field Theory - Octahedral Complexes02:58

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
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Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

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Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
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Surface Tension and Surface Energy01:16

Surface Tension and Surface Energy

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When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
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Wood Surfacing01:14

Wood Surfacing

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Wood surfacing is a critical finishing process designed to smoothen the wood surface, enhance its dimensional accuracy, and make handling safer. This process compensates for potential shrinkage during the seasoning phase by marginally increasing the wood dimensions before surfacing. It also helps correct some distortions that may occur as the wood dries.
The equipment used in the surfacing process is a plane equipped with rotating blades. This tool efficiently smoothens the wood surface and can...
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Polymer Microarrays for High Throughput Discovery of Biomaterials
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Surface Analysis: From Single Crystals to Biomaterials.

David G Castner1

  • 1National ESCA & Surface Analysis Center for Biomedical Problems, Molecular Engineering & Sciences Institute, Departments of Bioengineering & Chemical Engineering, University of Washington, Seattle, WA 98195-1653 USA.

Surface and Interface Analysis : SIA
|November 3, 2018
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Summary
This summary is machine-generated.

Surface and interface characterization is crucial for material performance across diverse fields like catalysis and biomaterials. Expertise in surface analysis is transferable, enabling advancements in various scientific and industrial applications.

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Area of Science:

  • Surface science and interface characterization are vital across multiple scientific disciplines.

Background:

  • Surfaces and interfaces significantly impact material performance in areas such as catalysis, biomaterials, microelectronics, tribology, and adhesion.
  • Characterizing these regions presents unique challenges, yet often employs similar investigative approaches.

Purpose of the Study:

  • To highlight the common methodologies and transferable expertise in surface and interface analysis across different scientific fields.
  • To illustrate the application of surface analysis techniques from fundamental research to industrial and biomedical applications.

Main Methods:

  • Utilizing specialized instrumentation for probing material surface regions.
  • Employing multiple experimental techniques, often combined with theoretical calculations and simulations.
  • Developing new instrumentation and data analysis methods for comprehensive surface characterization.

Main Results:

  • Model samples with defined structures aid in understanding fundamental processes and developing analytical tools.
  • Careful sample handling and preparation are essential to prevent alteration of surface properties.
  • Surface analysis expertise gained in one area is readily applicable to other diverse fields.

Conclusions:

  • A unified approach and transferable skills facilitate surface analysts' movement between research and application areas.
  • The manuscript presents a career path example demonstrating the broad applicability of surface science expertise.
  • Effective characterization relies on a combination of advanced techniques, theoretical support, and meticulous sample preparation.