“Bachelorette” alum Kaitlyn Bristowe didn’t hold back on why she felt “very used” by ex-fiancé Jason Tartick during their four-year romance. “Although my house was paid off, I would ...

Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China ...