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Hong, Daewha,Kang, Kyungtae,Hong, Seok-Pyo,Shon, Hyun Kyong,Son, Jin Gyeong,Lee, Tae Geol,Choi, Insung S. American Chemical Society 2012 Langmuir Vol.28 No.1
<P>In this paper, carbamate-based self-assembled monolayers (SAMs) of alkanethiolates on gold were suggested as a versatile platform for release of amine-bearing molecules in response to the electrical signal. The designed SAMs underwent the electrochemical oxidation on the gold surface with simultaneous release of the amine molecules. The synthesis of the thiol compounds was achieved by coupling isocyanate-containing compounds with hydroquinone. The electroactive thiol was mixed with 11-mercaptoundecanol [HS(CH<SUB>2</SUB>)<SUB>11</SUB>OH] to form a mixed monolayer, and cyclic votammetry was used for the characterization of the release behaviors. The mixed SAMs showed a first oxidation peak at +540 mV (versus Ag/AgCl reference electrode), indicating the irreversible conversion from carbamate to hydroquinone groups with simultaneous release of the amine molecules. The analysis of ToF-SIMS further indicated that the electrochemical reaction on the gold surface successfully released amine molecules.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/langd5/2012/langd5.2012.28.issue-1/la203420h/production/images/medium/la-2011-03420h_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/la203420h'>ACS Electronic Supporting Info</A></P>
IoT-Based Smart Garbage System for Efficient Food Waste Management
Hong, Insung,Park, Sunghoi,Lee, Beomseok,Lee, Jaekeun,Jeong, Daebeom,Park, Sehyun Hindawi Publishing Corporation 2014 The Scientific World Journal Vol.2014 No.-
<P>Owing to a paradigm shift toward Internet of Things (IoT), researches into IoT services have been conducted in a wide range of fields. As a major application field of IoT, waste management has become one such issue. The absence of efficient waste management has caused serious environmental problems and cost issues. Therefore, in this paper, an IoT-based smart garbage system (SGS) is proposed to reduce the amount of food waste. In an SGS, battery-based smart garbage bins (SGBs) exchange information with each other using wireless mesh networks, and a router and server collect and analyze the information for service provisioning. Furthermore, the SGS includes various IoT techniques considering user convenience and increases the battery lifetime through two types of energy-efficient operations of the SGBs: stand-alone operation and cooperation-based operation. The proposed SGS had been operated as a pilot project in Gangnam district, Seoul, Republic of Korea, for a one-year period. The experiment showed that the average amount of food waste could be reduced by 33%.</P>
Design and implementation of intelligent energy distribution management with photovoltaic system
Insung Hong,Byeongkwan Kang,Sehyun Park IEEE 2012 IEEE transactions on consumer electronics Vol.58 No.2
<P>As increasing power consumption is becoming a huge problem, renewable energy has been highlighted recently. Many companies and research centers study this new sustainable energy, and various products have appeared to the public. However, this kind of researches concentrates on the elemental technologies, and now a management system is needed to manage these technologies to maximize energy efficiency. In this paper, we propose the system of Intelligent Energy Distribution Management (iEDM) to monitor fast-changing environmental variables and manage solar power flexibly. Compared with normal utility interactive systems, the iEDM improves the energy efficiency up to 5.6 percent.</P>
Mussel-inspired, perfluorinated polydopamine for self-cleaning coating on various substrates
Hong, Daewha,Bae, KiEun,Hong, Seok-Pyo,Park, Ji Hun,Choi, Insung S.,Cho, Woo Kyung The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.79
<P>We designed a perfluorinated dopamine derivative, which, upon oxidative polymerization, formed a structurally rough film of extremely low surface energy on various substrates. The static water contact angles larger than 150° and the low water sliding angles less than 7° confirmed the formation of superhydrophobic, self-cleaning surfaces.</P> <P>Graphic Abstract</P><P>Substrate-independent coating for self-cleaning, superhydrophobic surfaces was achieved by oxidative polymerization of a mussel-inspired dopamine derivative (<I>f</I>-DOPA). <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc02775b'> </P>