http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jung, Jin-Mi,Yoo, Hae-Wook,Stellacci, Francesco,Jung, Hee-Tae WILEY-VCH Verlag 2010 Advanced Materials Vol.22 No.23
<B>Graphic Abstract</B> <P>Ultrasensitive DNA detection using enhanced two-photon excited fluorescence: DNA detection systems formed on a highly regular gold nanopattern over a large area show enhanced sensitivity from high to ultralow concentrations (∼10−11 M, see figure) target molecules. The observed two-photon excited fluorescence on the gold patterned surface is enhanced over two orders of magnitude compared with the molecules on the glass surface. <img src='wiley_img_2010/09359648-2010-22-23-ADMA200903745-content.gif' alt='wiley_img_2010/09359648-2010-22-23-ADMA200903745-content'> </P>
Two-Dimensional Nanoparticle Supracrystals: A Model System for Two-Dimensional Melting
Kim, Jin Young,Kwon, S. Joon,Chang, Jae-Byum,Ross, Caroline A.,Hatton, T. Alan,Stellacci, Francesco American Chemical Society 2016 Nano letters Vol.16 No.2
<P>In a Langmuir trough, successive compression cycles can drive a two-dimensional (2D) nanoparticle supracrystal (NPSC) closer to its equilibrium structure. Here, we show a series of equilibrated 2D NPSCs consisting of gold NPs of uniform size, varying solely in the length of their alkanethiol ligands. The ordering of the NPSC is governed by the ligand length, thus providing a model system to investigate the nature of 2D melting in a system of NPs. As the ligand length increases the supracrystal transitions from a crystalline to a liquid-like phase with evidence of a hexatic phase at an intermediate ligand length. The phase change is interpreted as an entropy-driven phenomenon associated with steric constraints between ligand shells. The density of topological defects scales with ligand length, suggesting an equivalence between ligand length and temperature in terms of melting behavior. On the basis of this equivalence, the experimental evidence indicates a two-stage 2D melting of NPSCs.</P>