11780
When these nanorods are embedded in a polymer matrix , they give rise to composite materials in which the structural anisotropy at the nanoscale translates into functional anisotropy in the form of direction - dependent electrical bistability .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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