Colloidal zinc oxide-copper(I) oxide nanocatalysts for selective aqueous photocatalytic carbon dioxide conversion into methane.

Developing catalytic systems with high efficiency and selectivity is a fundamental issue for photochemical carbon dioxide conversion. In particular, rigorous control of the structure and morphology of photocatalysts is decisive for catalytic performance. Here, we report the synthesis of zinc oxide-copper(I) oxide hybrid nanoparticles as colloidal forms bearing copper(I) oxide nanocubes bound to zinc oxide spherical cores.

Correlates of caregiver burden for Korean elders according to cognitive and functional status.

Background: Caregiver strain was investigated in a community sample of Korean elders with cohabiting caregivers, and factors associated with this were compared between groups classified by cognitive and functional impairment.

Methods: The study sample consisted of 484 elders and their cohabiting caregivers resident in Kwangju, South Korea. Caregiver burden was measured by the Zarit Burden Interview.