| 1. |
Carbon Thin Films Prepared by Pulsed Laser Deposition. |
| 2. |
張 興, 謝 華清, 藤井 丕夫, 高橋 厚史, 吾郷 浩樹, 清水 哲夫, 阿部 秀和, 懸架白金薄膜面方向の熱伝導率および電気伝導度の測定, 熱物性 : Japan journal of thermophysical properties, Vol.19, No.1, pp.9-14, 2005.01. |
| 3. |
G33 Observation of ionic liquid interface in a nanotube. |
| 4. |
B121 Experimental study on heat transfer between an individual carbon nanotube and surrounding gases
Carbon nanotubes (CNTs) have high intrinsic thermal conductivity and high surface-to-volume ratio, thus CNT-based fins is considered to be promising for hign performance device cooling. In addition, exploring the heat transfer between a CNT and gases is important not only for CNT-based gas sensors but also for scientific interest oi mterfacial heat transport. In this work, we have developed novel technique for measuring heat transfer coefficients between an individual carbon nanotube and surrounding gases (Air, N_2, Ar, He) using platinum hot film sensor. Measured heat transfer coefficients quantitatively show good agreement with estimated values by kinetic gas theory at atmospheric pressure but do not match with theoretical prediction at low pressure regime.. |
| 5. |
G114 Formation and growth of nanobubbles at solid-liquid interfaces
Boiling is applied to many industrial machines due to its high heat transfer coefficient. However, a very complex mechanism of boiling, especially bubble nucleation, is still not sufficiently understood. On the other hand, numerous experiments have revealed the existence of soft domains that called nanobubbles at the solid-liquid interface. In this study, to investigate the influence of the solid-liquid interface nanobubbles on the bubble nucleation of boiling, an atomic force microscope is used to characterize the morphology of nanobubbles. The temperature dependence of the nanobubbles and temporal changes are also observed.. |
| 6. |
C215 Study of droplet condensation process on graphite surface by using ESEM
Heat transfer performance of dropwise condensation is higher than filmwise one due to droplet removal from the condensed surface. In order to further enhancement of its performance, removal of microscale droplet is a key issue. However, condensation mechanism at microscale on hydrophobic-hydrophilic hybrid surface is not understood, although all surfaces are consisted with those combinations. In this study, we conducted condensation experiments on a graphite surface at 0℃ and 550 to 600 Pa by using environmental scanning electron microscope (ESEM). Nanoscale step-terrace structures on graphite surface are obtained by using an atomic force microscope (AFM) before ESEM experiments. It was found that condensed droplets with diameter of 150 to 300 nm are lined up along step edges at over 150 nm intervals. In addition, we found that most droplets are on the steps of height of 1 nm and shorter droplet intervals are induced by higher steps and shorter terrace width. Our results were analyzed by an extended nucleation theory and we found that water molecules attracted on steps play an important role for droplet condensation.. |
| 7. |
C222 Nanoscale thermal mapping by using phase change of nanoparticles in TEM
Micro/nanoscale temperature measurement is a key technique to understand the thermal transport of nanomaterials. In this work, we treat nanoscale temperature distribution of individual MWCNT using a transmission electron microscope (TEM) and phase transition of metal nanoparticles. Nanoparticles are deposited on an individual CNT which bridges between Pt electrodes and are heated by Joule heating. Metal nanoparticles reach them melting point, and contrast change occurs in TEM images because of liquid-solid transition. Temperature distribution can be obtained as below or above the melting point. Spatial resolution depends on the size of nanoparticle and it's about 100nm.. |
| 8. |
C221 Frequency modulation atomic force microscopy of nanobubbles at solid-liquid interfaces
Highly-stable nanoscale gas domains that called nanobubbles and micropancakes at the solid-liquid interfaces have been widely studied for over a decade. On the other hand, boiling is applied to many industrial machines due to its high heat transfer coefficient. However, a very complex mechanism of boiling, especially bubble nucleation, is still not sufficiently understood. In the present study we adopted the high sensitivity atomic force microscopy measurement mode, frequency modulation atomic force microscope (FM-AFM), to investigate the influence of the solid-liquid interface nanobubbles on the bubble nucleation of boiling. It revealed the presence of very thin 0.1-0.6 nm thickness gas-phase that is different from the conventional nanobubbles.. |
| 9. |
20pm3-PM020 Experimental study on phonon thermal conduction using focused ion beam
We conducted an experiment to investigate phonon thermal conduction in multi-walled carbon nanotube. Length dependence of thermal conductivity of a multi-walled carbon nanotube up to 10 μm is reported by applying quasi-ballistic thermal conduction model for experimentally obtained thermal conductance. We suggest that phonon thermal conduction in this length is still in ballistic or quasi-ballistic region. Experimental equipment used for this experiment are T-type sensor for thermal conductance measurement, focused ion beam (FIB) irradiation to control the sample length and phonon free path, and transmission electron microscopy (TEM) to evaluate the size and uniformity of the defects induced by FIB irradiation.. |
| 10. |
In Situ Nanoscale Observation of Water Using TEM. |
| 11. |
In Situ Nanoscale Observation of Water Using TEM. |
| 12. |
Report on CANEUS2004. |
| 13. |
Trends in MEMS and Dynamics of Microbubble, KONSORYU, Vol. 16, No. 3, PP198-206. |
| 14. |
Microfabrication and Application to Thruster. |
