What is aggregation induced enhanced emission?
Aggregation-induced emission (AIE) is an abnormal phenomenon that is observed with certain organic luminophores (fluorescent dyes). Most organic compounds have planar structures and higher photoemission efficiencies in solution than in the solid state.
Who discovered aggregation emissions?
Ben Zhong Tang
1. Introduction. A revolutionary class of fluorescence materials featuring emission triggered by aggregation has received great attention in sensor applications since their discovery by Ben Zhong Tang in 2001.
What is AIEgens?
AIEgens are a class of nonconventional materials, which are non-emissive or weakly luminescent in the solution state but emit efficiently in the aggregate state. The study of AIE phenomenon is of academic value and has practical implications.
What is a Luminogen?
Noun. luminogen (plural luminogens) Any atom or molecule which, when added to a crystal, causes it to luminesce or fluoresce.
What state is most stable aggregation?
State of aggregation for thermodynamic processes is the standard state, sometimes called the reference state, is defined by specifying certain conditions. The normal standard state is commonly defined as the most stable physical form of the substance at the specified temperature and a pressure of 1 bar or 1 atmosphere.
What is stable state of aggregation?
What causes aggregation?
Protein aggregation can occur through chemical or physical degradation and is dependent on the thermodynamic stability of the protein’s native state. The driving force behind protein aggregation is the reduction in free surface energy by the removal of hydrophobic residues from contact with the solvent.
How do you induce protein aggregation?
Induction Factors Causing Protein Aggregation. Aggregation can be induced by a wide variety of conditions, including temperature, mechanical stress such as shaking and stirring, pumping, freezing and/or thawing and formulation.
What is a cell aggregation?
Cell aggregation is a feature of tissue formation that allows the binding of cells of the same type. It is this specific grouping of cells that enables the tissue to perform its intended purpose. Cell aggregation is the combination of two cellular functions: cell-to-cell recognition and cell adhesion.
What is aggregation in peptide?
Aggregation can take several different forms and the term is used to describe a number of different processes during which peptide molecules associate into larger species consisting of multiple polypeptide chains (figure 1).