http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yuk, Jong Min,Kim, Kwanpyo,Alemá,n, Benjamí,n,Regan, William,Ryu, Ji Hoon,Park, Jungwon,Ercius, Peter,Lee, Hyuck Mo,Alivisatos, A. Paul,Crommie, Michael F.,Lee, Jeong Yong,Zettl, Alex American Chemical Society 2011 NANO LETTERS Vol.11 No.8
<P>We report a new and highly versatile approach to artificial layered materials synthesis which borrows concepts of molecular beam epitaxy, self-assembly, and graphite intercalation compounds. It readily yields stacks of graphene (or other two-dimensional sheets) separated by virtually any kind of “guest” species. The new material can be “sandwich like”, for which the guest species are relatively closely spaced and form a near-continuous inner layer of the sandwich, or “veil like”, where the guest species are widely separated, with each guest individually draped within a close-fitting, protective yet atomically thin graphene net or veil. The veils and sandwiches can be intermixed and used as a two-dimensional platform to control the movements and chemical interactions of guest species.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2011/nalefd.2011.11.issue-8/nl201647p/production/images/medium/nl-2011-01647p_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl201647p'>ACS Electronic Supporting Info</A></P>
Yuk, Jong Min,Seo, Hyeon Kook,Choi, Jang Wook,Lee, Jeong Yong American Chemical Society 2014 ACS NANO Vol.8 No.7
<P>Recent real-time analyses have provided invaluable information on the volume expansion of silicon (Si) nanomaterials during their electrochemical reactions with lithium ions and have thus served as useful bases for robust design of high capacity Si anodes in lithium ion batteries (LIBs). In an effort to deepen the understanding on the critical first lithiation of Si, especially in realistic liquid environments, herein, we have engaged <I>in situ</I> graphene liquid cell transmission electron microscopy (GLC-TEM). In this technique, chemical lithiation is stimulated by electron-beam irradiation, while the lithiation process is being monitored by TEM in real time. The real-time analyses informing of the changes in the dimensions and diffraction intensity indicate that the very first lithiation of Si nanoparticle shows anisotropic volume expansion favoring the ⟨110⟩ directions due to the smaller Li diffusion energy barrier at the Si–electrolyte interface along such directions. Once passing this initial volume expansion stage, however, Li diffusion rate becomes isotropic in the inner region of the Si nanoparticle. The current study suggests that the <I>in situ</I> GLC-TEM technique can be a useful tool in understanding battery reactions of various active materials, particularly those whose initial lithiation plays a pivotal role in overall electrochemical performance and structural stability of the active materials.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2014/ancac3.2014.8.issue-7/nn502779n/production/images/medium/nn-2014-02779n_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn502779n'>ACS Electronic Supporting Info</A></P>
Yuk, Jong Min,Kim, Tae Whan,Lee, Jeong Yong,No, Young Soo,Kim, Dong Hun,Choi, Won Kook,Jin, Sungho IOP Pub 2009 Nanotechnology Vol.20 No.5
<P>Sub-10 nm In(PO<SUB>3</SUB>)<SUB>3</SUB> nanocrystals (NCs) were created in an insulating matrix by rapid thermal annealing to form nanocomposite structures. On annealing at a temperature of 400 °C, P<SUB>2</SUB>O<SUB>5</SUB> NCs were formed by substituting P for Zn atoms in ZnO films via the kickout diffusion mechanism based on the fixed oxygen sublattice. On annealing at a higher temperature of 600 °C, however, In(PO<SUB>3</SUB>)<SUB>3</SUB> NCs were nucleated by diffusion of In atoms from the substrate into the sites of P<SUB>2</SUB>O<SUB>5</SUB> NCs that coalesced by moving atoms to neighboring grains in the strain relaxed region. The formation mechanisms of sub-10 nm In(PO<SUB>3</SUB>)<SUB>3</SUB> NCs in an insulating matrix due to rapid thermal annealing are described on the basis of the experimental results.</P>
Yuk, Jong Min,Kim, Kwanpyo,Lee, Zonghoon,Watanabe, Masashi,Zettl, A.,Kim, Tae Whan,No, Young Soo,Choi, Won Kook,Lee, Jeong Yong American Chemical Society 2010 ACS NANO Vol.4 No.6
<P>Zero- and one-dimensional metal nanocrystals were successfully fabricated with accurate control in size, shape, and position on semiconductor surfaces by using a novel <I>in situ</I> fabrication method of the nanocrystal with a biasing tungsten tip in transmission electron microscopy. The dominant mechanism of nanocrystal formation was identified mainly as local Joule heating-assisted electromigration through the direct observation of formation and growth processes of the nanocrystal. This method was applied to extracting metal atoms with an exceedingly faster growth rate (∼10<SUP>5</SUP> atoms/s) from a metal-oxide thin film to form a metal nanocrystal with any desired size and position. By real-time observation of the microstructure and concurrent electrical measurements, it was found that the nanostructure formation can be completely controlled into various shapes such as zero-dimensional nanodots and one-dimensional nanowires/nanorods.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2010/ancac3.2010.4.issue-6/nn901674p/production/images/medium/nn-2009-01674p_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn901674p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn901674p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn901674p'>ACS Electronic Supporting Info</A></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn901674p'>ACS Electronic Supporting Info</A></P>
Dextran/PLGA Double-Layered Microspheres for Sustained Release of Doxorubicin
( Jong Hak Park ),( Shin Eom ),( Sik Il Ahn ),( Hyun Hye Hong ),( Cho Min Kim ),( Soon Hong Yuk ),( Dong Won Lee ),( John M Rhee ),( Kye Hwan Lee ),( Gil Son Khang ) 한국조직공학·재생의학회 2009 조직공학과 재생의학 Vol.6 No.4
Biodegradable polymer microspheres have been extensively developed as drug carriers that alleviate burst release and control drug release profiles. In this study, we report a simple method to develop double-layered microspheres for controlled and sustained drug release. Double layered microspheres were prepared using PLGA and natural hydrophilic polymer dextran by a simple method based on an emulsion-solvent evaporation method. Microspheres had a double layered structure with dextran layer in the core and PLGA on the surface due to phase separation and encapsulated doxorubicin as a model drug in their core. The molecular weight and concentration of PLGA dominated the structure, in vitro degradation and drug release profiles of microspheres. Dextran/PLGA double- layered microspheres had a diameter about 200 m and alleviated initial burst release. Drug release profiles from dextran/PLGA double-layered microspheres can becontrolled by manipulating the thickness of shell of the microspheres. We anticipate great potential of dextran/PLGA double-layered microspheres for controlled and sustained drug delivery, given their simple formulation and the control of drug release profiles.
Autonomic dysfunction in SCN9A-associated primary erythromelalgia.
Kim, Min-Kyeong,Yuk, Ji-Won,Kim, Hyang-Sook,Park, Ki-Jong,Kim, Dae-Seong Rapid Communications of Oxford ; Steinkopff Verlag 2013 Clinical autonomic research Vol.23 No.2
<P>Primary erythromelalgia (EM) is an autosomal dominant disorder caused by mutations of SCN9A. It is clinically characterized by reddish discoloration and episodic burning sensation of distal extremities triggered by warmth. We report a 49-year-old male with primary EM caused by SCN9A mutation (p.F216S), in whom an autonomic reflex screening test revealed a mild sudomotor dysfunction.</P>