Total: 173 data, Page 15 of 18
|33. [Evolutionary Nanomaterials & Nanodevices] Yoon Huh, Jeong Yong Lee*, Jinwoo Cheon, Young Kyu Hong, Ja Yong Koo, Tae Jae Leed, and Cheol Jin Lee*
Controlled Growth of Carbon Nanotubes over Cobalt Nanoparticles by Thermal Chemical Vapor Deposition
J. Mater. Chem., 13, 2297-2300 (Jul 16, 2003) DOI : https://pubs.rsc.org/en/Content/ArticleLanding/2003/JM/b304582j#!divAbstract
Controlled growth of carbon nanotubes (CNTs) has been achieved by thermal chemical vapor depositio...
|32. [Evolutionary Nanomaterials & Nanodevices] Sergey N.Zaretskiy, Young-Kyu Hong, Dong Han Ha, Ji-Hyun Yoon, Jinwoo Cheon*, and Ja-Yong Koo*
Growth of Carbon Nanotubes from Co Nanoparticles and C2H2 by Thermal Chemical Vapor Deposition
Chem. Phys. Lett., 372, 300-305 (Mar 28, 2003) DOI : https://doi.org/10.1016/S0009-2614(03)00405-6
Carbon nanotubes (CNTs) were grown from Co nanoparticles by thermal chemical vapor deposition ...
|31. [Evolutionary Nanomaterials & Nanodevices] Sang-Min Lee, Sung-Nam Cho, and Jinwoo Cheon*
Anisotropic Shape Control of Colloidal Inorganic Nanocrystals
Adv. Mater., 15 (5), 441-444 (Mar 7, 2003) DOI : https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.200390102
Nanocrystals, Colloidal Nanocrystals, Inorganic Nanocrystals, Semiconducting Nanorods, Shape‐controlled synthesis
|30. [Evolutionary Nanomaterials & Nanodevices] H. Y. Lee, Y. Sacho, T. Kanki, H. Tanaka, H. Shirakawa, Jinwoo Cheon, J. H. Yoon, N. J. Kang, J. I. Park, and T. Kawai
DNA-Directed Magnetic Network Formations with Ferromagnetic Nanoparticles
J. Nanosci. Nanotechnol., 2 (6), 613-615 (Dec 1, 2002) DOI : https://www.ingentaconnect.com/content/asp/jnn/2002/00000002/00000006/art00002?token=0064164a321b36642f46762530482972715a614f6d29222c227e37256720297d76343e7b6e7b6c245a3843572ba2a189eee2
We formed a DNA network embedding ferromagnetic cobalt nanoparticles with a 12-nm diameter through...
|29. [Evolutionary Nanomaterials & Nanodevices] Yong-Ho Kim, Young-wook Jun, Byung-Ho Jun, Sang-Min Lee, and Jinwoo Cheon*
Sterically Induced Shape and Crystalline Phase Control of GaP Nanocrystals
J. Am. Chem. Soc., 124 (46), 13656-13657 (Nov 1, 2002) DOI : https://pubs.acs.org/doi/abs/10.1021/ja027575b
We demonstrate a novel synthetic scheme that can be used to control the crystalline phase an...
|28. [Evolutionary Nanomaterials & Nanodevices] Sang-Min Lee, Young-wook Jun, Sung-Nam Cho, and Jinwoo Cheon*
Single-Crystalline Star-Shaped Nanocrystals and Their Evolution: Programming the Geometry of Nano-Building Blocks
J. Am. Chem. Soc., 124 (38), 11244-11245 (Sep 1, 2002) DOI : https://pubs.acs.org/doi/abs/10.1021/ja026805j
We demonstrate a novel synthetic scheme that can be used to differentially guide the shape o...
|27. [Evolutionary Nanomaterials & Nanodevices] Jong‐Il Park, Nam‐Jung Kang, Young‐Wook Jun, Sang Jun Oh, Heong‐Chul Ri, and Jinwoo Cheon*
Superlattice and Magnetism Directed by the Size and Shape of Nanocrystals
ChemPhysChem, 3 (6), 543-547 (Jun 17, 2002) DOI : https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/1439-7641%2820020617%293%3A6%3C543%3A%3AAID-CPHC543%3E3.0.CO%3B2-E
With a baton the general directs soldiers and the conductor musicians, and in the nanoworld the rodlike shape also means control, as this form enhances magnetic and coercive properties of crystalline aggregates. Also reported here is a tunable synthetic method, in which the overall shape of the crystal is determined by a balance of kinetically and thermodynamically controlled growth mechanisms. The graphic shows one example of the degree of ordering available in the crystalline through this method.
|26. [Evolutionary Nanomaterials & Nanodevices] Young-Kyu Hong, Hanchul Kim, Geunseop Lee, Wondong Kim, Jong-Il Park, Jinwoo Cheon*, and Ja-Yong Koo*
Controlled Two-Dimensional Distribution of Nanoparticles by Spin-Coating Method
Appl. Phys. Lett., 80 (5), 844-846 (Feb 4, 2002) DOI : https://doi.org/10.1063/1.1445811
We demonstrate that the controlled distribution of nanoparticles can be achieved by employing the ...
|25. [Evolutionary Nanomaterials & Nanodevices] Jong-Il Park, Nam-Jung Kang, Sang-Min Lee, Sehun Kim, S. J. Oh, H. -C Ri, and Jinwoo Cheon*
Enhanced Magnetic Transition of Core-Shell Cobalt-Platinum Nanoalloys
MRS Online Proceedings Library Archive, 721, 58 (Feb 1, 2002) DOI : https://doi.org/10.1557/PROC-721-E5.8
Synthesis of ‘solid solution’ and ‘core-shell’ types of well defined Co-Pt based nanoalloys smaller than 10nm have been achieved by redox transmetalation reactions. This redox transmetalation are selectively observed only if the redox potential between two metals is favorable. The composition of the magnetic alloys can also be tuned by adjusting the ratio of reactants. Annealed core-shell nanoparticles transformed into mixed nanoalloys with face centered tetragonal (fct) structures, which show large coercivity and ferromagnetism at room temperature. These nanoparticles can potentially be used as an independent single magnetic bit of tera-bit information storage. Also, this kind of redox transmetalation reaction can be utilized as a general process to synthesize various types of nanoalloys with controlled composition in a selective fashion.
|24. [Evolutionary Nanomaterials & Nanodevices] Young-wook Jun, Yoon-young Jung, and Jinwoo Cheon*
Architectural Control of Magnetic Semiconductor Nanocrystals
J. Am. Chem. Soc., 124 (4), 615-619 (Jan 30, 2002) DOI : https://pubs.acs.org/doi/abs/10.1021/ja016887w
Shape- and dopant-controlled magnetic semiconductor nanocrystals have been achieved by the thermolysis of nonpyrophoric and less reactive single molecular precursors under a monosurfactant system. Reaction parameters governing both the intrinsic crystalline phase and the growth regime (kinetic vs thermodynamic) are found to be important for the synthesis of various shapes of MnS nanocrystals that include cubes, spheres, 1-dimensional (1-D) monowires, and branched wires (bipods, tripods, and tetrapods). Obtained nanowires exhibit enhanced optical and magnetic properties compared to those of 0-D nanospheres. Proper choice of molecular precursors and kinetically driven low-temperature growth afford dopant controlled 1-D Cd1-xMnxS nanorods at high levels (up to ∼12%) of Mn, which is supported by repeated surface exchange experiments and X-ray diffraction (XRD) and electron paramagnetic resonance (EPR) analyses.