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Related Concept Videos

Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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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.
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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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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Advanced Compositional Analysis of Nanoparticle-polymer Composites Using Direct Fluorescence Imaging
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Directed Nanoparticle Assembly through Polymer Crystallization.

Shan Mei1, Mark Staub1, Christopher Y Li1

  • 1Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 3, 2019
PubMed
Summary
This summary is machine-generated.

Polymer single crystals (PSCs) can direct nanoparticle assembly into complex structures. This method enables the creation of nanosandwiches for catalysis and the synthesis of Janus nanoparticles.

Keywords:
nanoparticle assembliesnanoparticlespolymer crystallizationpolymer single crystalsself-assembly

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Nanoparticle assembly is crucial for advanced materials.
  • Polymer single crystals (PSCs) are traditionally used for structural studies.
  • Recent work highlights PSCs as functional nanoscale materials.

Purpose of the Study:

  • To review the use of polymer crystallization for nanoparticle assembly.
  • To demonstrate PSCs as a platform for creating complex nanostructures.
  • To explore applications of PSC-directed nanoparticle assemblies.

Main Methods:

  • Utilizing in situ or ex situ polymer crystal growth to guide nanoparticle assembly.
  • Employing end-functionalized polymers to form 2D nanosheet PSCs.
  • Conjugating complementary nanoparticles with PSCs to create nanosandwiches.

Main Results:

  • Demonstrated successful nanoparticle assembly into complex shapes using PSCs.
  • Created nanosandwich structures with potential applications in catalysis and spectroscopy.
  • Developed a novel method for asymmetric nanoparticle synthesis via nanosandwich dissolution.

Conclusions:

  • Polymer single crystals offer a versatile route for directed nanoparticle assembly.
  • Nanosandwich structures show promise for various nanotechnological applications.
  • This approach provides a unique pathway for synthesizing Janus nanoparticles.