In reading a paper on human tissue-engineering research for her seventh-grade science class last year, Samantha Marquez wondered why scientists weren’t using living cells to create organs instead of nonliving particles. “I pushed my dad, ‘Come on, come on, we can totally do this. This is an awesome idea,‘“ Samantha recalled prodding her father, Manuel Marquez, a scientist from YNano LLC, a science research and development company in Midlothian. He also is an adjunct professor at Virginia Commonwealth University’s Department of Mechanical Engineering and at Arizona State University.