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- 저자 : Hontz, Eric R. (검색결과 2 건)
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Park, Sarah S.,Hontz, Eric R.,Sun, Lei,Hendon, Christopher H.,Walsh, Aron,Van Voorhis, Troy,Dincă,, Mircea American Chemical Society 2015 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.137 No.5
<P>Isostructural metal–organic frameworks (MOFs) M<SUB>2</SUB>(TTFTB) (M = Mn, Co, Zn, and Cd; H<SUB>4</SUB>TTFTB = tetrathiafulvalene tetrabenzoate) exhibit a striking correlation between their single-crystal conductivities and the shortest S···S interaction defined by neighboring TTF cores, which inversely correlates with the ionic radius of the metal ions. The larger cations cause a pinching of the S···S contact, which is responsible for better orbital overlap between p<SUB><I>z</I></SUB> orbitals on neighboring S and C atoms. Density functional theory calculations show that these orbitals are critically involved in the valence band of these materials, such that modulation of the S···S distance has an important effect on band dispersion and, implicitly, on the conductivity. The Cd analogue, with the largest cation and shortest S···S contact, shows the largest electrical conductivity, σ = 2.86 (±0.53) × 10<SUP>–4</SUP> S/cm, which is also among the highest in microporous MOFs. These results describe the first demonstration of tunable intrinsic electrical conductivity in this class of materials and serve as a blueprint for controlling charge transport in MOFs with π-stacked motifs.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2015/jacsat.2015.137.issue-5/ja512437u/production/images/medium/ja-2014-12437u_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja512437u'>ACS Electronic Supporting Info</A></P>
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이혜옥,이옥자,김수지,Ivy Hontz,Amy Warner 한국간호과학회 2007 Asian Nursing Research Vol.1 No.3
Purpose To assess knowledge and attitude toward hepatitis B virus (HBV) infection among Korean immigrants in two cities in the Rocky Mountain region and to determine whether sociodemographic and cultural factors are related to the level of HBV knowledge. Methods Community-based participatory study was conducted in five Korean churches in the Rocky Mountain region to develop baseline data on HBV infection and vaccination behavior. All documents, including announcements, brochures, consent forms, and questionnaires were in Korean and English, and trained Korean interviewers collected the surveys by reviewing the questionnaires with participants at the churches. Results Knowledge of HBV infection was low and city of residence did not have a statistically significant impact on HBV infection knowledge. In the total sample, 62% identified transmission by sharing utensils and 21% believed that HBV was hereditary, while only 21% thought that HBV was spread through sexual contact. The majority of participants (61%) rated their English level as “minimum”. Knowledge of HBV infection was found to be associated with both demographic and acculturation factors (p < .05). Conclusion This study found not only a low level of knowledge of HBV infection but also misunderstanding of the risks of HBV infection. Knowledge of HBV infection was significantly associated with education and acculturation; therefore, culturally sensitive and group-tailored public health education for Korean and other Asian American Pacific Islanders should be developed to clarify misconceptions and misunderstandings about HBV infection.
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