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In this study , the authors use copper particles in order to functionalize a standard polyamide 12 powder for laser activation and selective metallization .
 material: copper; concept or principle: standard; material: polyamide 12; enabling technology: laser; manufacturing process: metallization
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: copper, standard, polyamide 12, laser, metallization 
Answer:
 material: copper; concept or principle: standard; material: polyamide 12; enabling technology: laser; manufacturing process: metallization