8554
As the nonmagnetic polymer patterns can be conveniently fabricated at low cost through photolithography and soft - lithography processes , our method provides a general yet very effective means to assemble a wide range of nonmagnetic objects with controlled spatial distribution , paving the way toward patterning functional microstructures .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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