This activity, produced by Solar Spark, uses "magic dye", a mixture of three different dye molecules. The mixture contains a yellow disperse dye, a direct blue dye and an acid red dye. When a fabric is put into the mixture, the dyes only attach to the types of fabrics they can bond well with. For example, the blue and yellow dyes both bond well to polyester cotton so therefore the material looks green when it comes out of the mixture.
In photovoltaic solar cells, the semiconductors are dyed to make them absorb light more efficiently. It is important to make sure that the dyes attach well to the semiconductor to do it’s job and this depends on good bonding between the dye and the semiconductor.
This activity can be used to illustrate:
* properties of materials
* chemical bonding
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Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.
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|Subject(s)||Chemistry, Practical work, Science|
|Age||7-11, 11-14, 14-16|
|Published||2010 to date|
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This resource is part of The Solar Spark
- The Solar Spark
- Magic Dye