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For a range of porosities and pore sizes , we have observed that porosity and surface morphology influence the thermal properties and contact angle of droplets on the printed surface .
 range, porosities, pore sizes, porosity, surface morphology, thermal properties, contact, droplets, surface
Please list all entity words in the text that fit the category. Output format is "word1, 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} 
Answer:
 range, porosities, pore sizes, porosity, surface morphology, thermal properties, contact, droplets, surface