Documents disponibles écrits par cet auteur

Nanoassembly of block copolymer micelle and graphene oxide to multilayer coatings / Jinkee Hong in Industrial & engineering chemistry research, Vol. 50 N° 6 (Mars 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3095–3099 Titre : Nanoassembly of block copolymer micelle and graphene oxide to multilayer coatings Type de document : texte imprimé Auteurs : Jinkee Hong, Auteur ; Yong Soo Kang, Auteur ; Sang Wook Kang, Auteur Année de publication : 2011 Article en page(s) : pp. 3095–3099 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Copolymer  Oxide Résumé : We report on the preparation and characterization of multidimensional nano-objects nanoassembly in film surface coatings. 2D reduced graphene oxide (rGO) sheets are assembled with 0D block copolymer micelles (BCM)s through electrostatic layer-by-layer assembly. The BCM/rGO paired nanoassembly surface coatings were formed via sequential adsorption of polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) aqueous solutionsand modified rGO sheets with carboxylic acids groups, and the process was monitored by UV−vis spectroscopy. SEM and AFM were used to investigate surface morphology and the growth of multilayer coatings as a function of the number of bilayers. In addition, encapsulated hydrophobic fluorescence organic dyes were imaged via confocal microscopy. Evenly distributed BCMs on coatings were successfully obtained. We expect that this demonstration offers a new route to introduce nanoassembly of two different dimensional-shaped nano-objects in surface coatings for many industrial uses and makes building more complex, functional multicomponent, and multidimensional structures possible for use in nano-objects incorporated various multicoating applications. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1022282 [article] Nanoassembly of block copolymer micelle and graphene oxide to multilayer coatings [texte imprimé] / Jinkee Hong, Auteur ; Yong Soo Kang, Auteur ; Sang Wook Kang, Auteur . - 2011 . - pp. 3095–3099. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3095–3099 Mots-clés : Copolymer  Oxide Résumé : We report on the preparation and characterization of multidimensional nano-objects nanoassembly in film surface coatings. 2D reduced graphene oxide (rGO) sheets are assembled with 0D block copolymer micelles (BCM)s through electrostatic layer-by-layer assembly. The BCM/rGO paired nanoassembly surface coatings were formed via sequential adsorption of polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) aqueous solutionsand modified rGO sheets with carboxylic acids groups, and the process was monitored by UV−vis spectroscopy. SEM and AFM were used to investigate surface morphology and the growth of multilayer coatings as a function of the number of bilayers. In addition, encapsulated hydrophobic fluorescence organic dyes were imaged via confocal microscopy. Evenly distributed BCMs on coatings were successfully obtained. We expect that this demonstration offers a new route to introduce nanoassembly of two different dimensional-shaped nano-objects in surface coatings for many industrial uses and makes building more complex, functional multicomponent, and multidimensional structures possible for use in nano-objects incorporated various multicoating applications. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1022282

One - pot preparation of titania - nanoparticles through hairy and crew - cut type micelle templates / Jinkee Hong in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9124–9127 Titre : One - pot preparation of titania - nanoparticles through hairy and crew - cut type micelle templates Type de document : texte imprimé Auteurs : Jinkee Hong, Auteur ; Sang Wook Kang, Auteur Année de publication : 2010 Article en page(s) : pp. 9124–9127 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nanoparticles  Titanium  oxide Résumé : A facile approach successfully produced block copolymer micelle templated titanium oxide nanoparticles via electrostatic interaction based adsorption between cationic polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) and negatively charged titania precursor, titanium(IV) bis(ammonium lactate)dihydroxide (TALH) complexes in aqueous solution. Both hairy and crew-cut types of block copolymer micelles were examined as a particle scaffold. The diameter of the titiania nanoparticles prepared were from 10 to 70 nm depending on the molecular weight or type of block copolymer micelle template. Also, mass production of titania nanoparticles on the Si-wafer was shown by a one-pot process. The size morphologies and distributions shown were confirmed by field emission scanning electron microscopy (FESEM). The results suggest that the versatile and environmentally friendly technique to manufacture titania nanoparticles, which could be easily widened to prepare electrostatic interaction based organic/inorganic complexes with further applications. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1010838 [article] One - pot preparation of titania - nanoparticles through hairy and crew - cut type micelle templates [texte imprimé] / Jinkee Hong, Auteur ; Sang Wook Kang, Auteur . - 2010 . - pp. 9124–9127. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9124–9127 Mots-clés : Nanoparticles  Titanium  oxide Résumé : A facile approach successfully produced block copolymer micelle templated titanium oxide nanoparticles via electrostatic interaction based adsorption between cationic polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) and negatively charged titania precursor, titanium(IV) bis(ammonium lactate)dihydroxide (TALH) complexes in aqueous solution. Both hairy and crew-cut types of block copolymer micelles were examined as a particle scaffold. The diameter of the titiania nanoparticles prepared were from 10 to 70 nm depending on the molecular weight or type of block copolymer micelle template. Also, mass production of titania nanoparticles on the Si-wafer was shown by a one-pot process. The size morphologies and distributions shown were confirmed by field emission scanning electron microscopy (FESEM). The results suggest that the versatile and environmentally friendly technique to manufacture titania nanoparticles, which could be easily widened to prepare electrostatic interaction based organic/inorganic complexes with further applications. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1010838

Rapid electromechanical transduction on a single-walled carbon nanotube film / Wonjoon Choi in Industrial & engineering chemistry research, Vol. 51 N° 45 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14714-14721 Titre : Rapid electromechanical transduction on a single-walled carbon nanotube film : Sensing fast mechanical loading via detection of electrical signal change Type de document : texte imprimé Auteurs : Wonjoon Choi, Auteur ; Jinkee Hong, Auteur Année de publication : 2013 Article en page(s) : pp. 14714-14721 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Loading  Carbon  Nanotube Résumé : Carbon nanotubes (CNTs) have been widely explored as next generation embedded-strain-pressure sensors. However, most investigations of CNT sensors did not consider the response time as a critical factor, although the ultrafast sensing of mechanical deformation is very important for the detection of dynamic loading or impact, such as in reactive armor systems. Owing to the low capacitance that shortens the response time of the electrical resistance changes induced by mechanical deformation, CNTs are expected to detect rapid electromechanical transduction without delay. Herein, we fabricate single-walled carbon nanotube (SWNT) films on diverse substrates, and evaluate their applications as sensors to detect rapid electromechanical transduction on a macroscopic scale. Under repetitive, high-speed mechanical loading, the SWNT films generate consistent electrical signal changes, which are accurately synchronized with their strain and the beginning of the deformation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301551a [article] Rapid electromechanical transduction on a single-walled carbon nanotube film : Sensing fast mechanical loading via detection of electrical signal change [texte imprimé] / Wonjoon Choi, Auteur ; Jinkee Hong, Auteur . - 2013 . - pp. 14714-14721. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14714-14721 Mots-clés : Loading  Carbon  Nanotube Résumé : Carbon nanotubes (CNTs) have been widely explored as next generation embedded-strain-pressure sensors. However, most investigations of CNT sensors did not consider the response time as a critical factor, although the ultrafast sensing of mechanical deformation is very important for the detection of dynamic loading or impact, such as in reactive armor systems. Owing to the low capacitance that shortens the response time of the electrical resistance changes induced by mechanical deformation, CNTs are expected to detect rapid electromechanical transduction without delay. Herein, we fabricate single-walled carbon nanotube (SWNT) films on diverse substrates, and evaluate their applications as sensors to detect rapid electromechanical transduction on a macroscopic scale. Under repetitive, high-speed mechanical loading, the SWNT films generate consistent electrical signal changes, which are accurately synchronized with their strain and the beginning of the deformation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301551a