Graphene electrode was fabricated by inkjet printing, as a new means of directly writing and micropatterning the electrode onto flexible polymeric materials. Graphene oxide sheets were dispersed in water and subsequently reduced using an infrared heat lamp at a temperature of ~200 °C in 10 min. Spacing between adjacent ink droplets and the number of printing layers were used to tailor the electrode's electrical sheet resistance as low as 0.3 MΩ/□ and optical transparency as high as 86%. The graphene electrode was found to be stable under mechanical flexing and behave as a negative temperature coefficient (NTC) material, exhibiting rapid electrical resistance decrease with temperature increase. Temperature sensitivity of the graphene electrode was similar to that of conventional NTC materials, but with faster response time by an order of magnitude. This finding suggests the potential use of the inkjet-printed graphene electrode as a writable, very thin, mechanically flexible, and transparent temperature sensor.

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This study addresses normative, social and cognitive factors related to the interest in becoming an entrepreneur in China, Vietnam, and the Philippines. The study's findings are based on surveys of 782 business students in these countries. A rather consistent pattern of country differences was found on most of the measures, which may reflect differences in the historical, cultural, economic and political contexts of these nations. The results of this study emphasize the importance of developing both self-efficacy and close social supports in enhancing potential for entrepreneurial activity in these countries.

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