Physical Confinement Promoting Formation of Cu2O−Au Heterostructures with Au Nanoparticles Entrapped within Crystalline Cu2O Nanorods

Building on the application of cuprite (Cu2O) in solar energy technologies and reports of increased optical absorption caused by metal-to-semiconductor energy transfer, a confinement-based strategy was developed to fabricate high aspect ratio, crystalline Cu2O nanorods containing entrapped gold nanoparticles (Au nps). Cu2O was crystallized within the confines of track-etch membrane pores, where this physical, assembly based method eliminates the necessity of specific chemical interactions to achieve a well-defined metal−semiconductor interface. With high-resolution scanning/transmission electron microscopy (S/TEM) and tomography, we demonstrate the encasement of the majority of Au nps by crystalline Cu2O and show crystalline Cu2O−Au interfaces that are free of extended amorphous regions. Such nanocrystal heterostructures are good candidates for studying the transport physics of metal/semiconductor hybrids for optoelectronic applications

Substance Use, Mental Illness, and Violence: The Co-Occurrence of Problem Behaviors Among Young Adults

A paucity of research exists in which the co-occurrence of substance use, mental illness, and violence in young adults is examined. Concurrently, there is also a lack of research explicating the contribution of theoretically based risk factors for these problematic outcomes in this population. This lack of both outcome and explanatory research equally affects the utility of theories and interventions for this population. This article utilizes a sample of N = 633 21-year-olds to examine the prevalence of (1) violence and substance use, (2) mental illness (i.e., mood and anxiety disorders) and substance use, and (3) the use of multiple substances and investigates the relationship between various social determinants and said outcomes. Overall, the prevalence rates for the comorbid conditions were low; although on average males had higher rates than did females. Individual attitudes, perceived opportunities, and recent stressful life events were associated with the co-occurrence of outcomes. Implications for behavioral health are explored