Autonomous nanomanufacturing of lead-free metal halide perovskite nanocrystals using a self-driving fluidic lab.

Lead-based metal halide perovskite (MHP) nanocrystals (NCs) have emerged as a promising class of semiconducting nanomaterials for a wide range of optoelectronic and photoelectronic applications. However, the intrinsic lead toxicity of MHP NCs has significantly hampered their large-scale device applications. Copper-base MHP NCs with composition-tunable optical properties have emerged as a prominent lead-free MHP NC candidate. However, comprehensive synthesis space exploration, development, and synthesis science studies of copper-based MHP NCs have been limited by the manual nature of flask-based synthesis and characterization methods. In this study, we present an autonomous approach for the development of lead-free MHP NCs via seamless integration of a modular microfluidic platform with machine learning-assisted NC synthesis modeling and experiment selection to establish a self-driving fluidic lab for accelerated NC synthesis science studies. For the first time, a successful and reproducible in-flow synthesis of Cs3Cu2I5 NCs is presented. Autonomous experimentation is then employed for rapid in-flow synthesis science studies of Cs3Cu2I5 NCs. The autonomously generated experimental NC synthesis dataset is then utilized for fast-tracked synthetic route optimization of high-performing Cs3Cu2I5 NCs.

The prostitution and trafficking of American Indian/Alaska Native women in Minnesota.

We examined social and physical violence experienced by American Indian/Alaska Native (AI/AN) women in prostitution and their impacts on the mental and physical health of 105 women (81% Anishinaabe, mean age = 35 years) recruited through service agencies in three Minnesota cities. In childhood, abuse, foster care, arrests, and prostitution were typical. Homelessness, rape, assault, racism, and pimping were common. The women's most prevalent physical symptoms included muscle pain, impaired memory or concentration, and headaches. Symptoms of post-traumatic stress disorder and dissociation were common, with more severe psychological symptoms associated with worse health. Most of the women wanted to leave prostitution and they most often identified counseling and peer support as necessary to accomplish this. Most saw colonization and prostitution of AI/AN women as connected.