Porous graphene oxide-surfactant/poly(lactic acid) (GO-S/PLA) nanocomposite film with highly ordered hexagonal pore arrangement was fabricated via a combination of ionic interaction-supported GO dispersion and the improved phase separation method. First, a flat nanocomposite film is prepared by coating a welldispersed GO-S/PLA solution on a solid substrate. Subsequently, the film is exposed to a mixture of chloroform and methanol as a suitable volatile solvent/ nonsolvent pair for both PLA and surfactant-grafted GO sheets. A monolayer of honeycomb patterns is spontaneously formed on the nanocomposite surface after complete evaporation of liquids under normal air conditions. Methanol plays a crucial role in effectively inducing and controlling the ordered honeycomb structures. The pore array features, which include pore diameter and pore density, are tuned by adjusting methanol content. Moreover, the patterned GO-S/PLA nanocomposite demonstrates as an efficient electrification component for highperformance triboelectric nanogenerator (TENG) owing to a large surface area and abundant electron-donating groups of GO sheets. A new TENG is composed of the honeycomb GO-S/PLA (hc-GO-S/PLA) and its replica of microdomepatterned polydimethylsiloxane (md-PDMS), as a pair of tribo-components with antagonistic friction surfaces. As a result, it can generate an output power of 0.54 mW cm À2 which is 8.6 times higher than that of TENG with a flat surface and without GO additives. We believe that hc-GO-S/PLA nanocomposite has potential applications in biotechnology, optics, and catalyst fields.

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The study was conducted (a) to assess use of any smoking cessation medications, (b) to identify factors associated with smoking, and (c) to assess knowledge of the health effects of smoking and attitudes toward smoking and seeking help for quitting among Vietnamese Americans. This is a descriptive study conducted with a nonrepresentative sample of 163 Vietnamese Americans. Current and former smokers constituted 24.4% and 25.6% of men and 1.2% and 3.5% of women, respectively. Of 20 current smokers, 17 (85%) reported use of cessation medications in their past quit attempts. Acculturation was the only significant correlate of ever smoking (vs. never smoking) in multivariate logistic regression analyses. Men who were less acculturated had more than 5 times the odds of being ever smokers (odds ratio = 5.33, 95% confidence interval = 1.37-20.78) compared with more acculturated men. Most participants had correct knowledge of the health effects of smoking regardless of age, education level, and smoking status. Attitudes toward smoking differed by age and education level but not by smoking status. Nurses working with Vietnamese Americans should be aware of the high rate of smoking among male immigrants and provide smoking cessation interventions.