Dunkelberger Adam, Compton Ryan, DeSario Paul A, Weidinger Daniel, Spann Bryan T, Pala Irina R, Chervin Christopher N, Rolison Debra R, Bussmann Konrad, Cunningham Paul, Melinger Joseph S, Alberding Brian G, Heilweil Edwin J, Owrutsky Jeffrey C
Naval Research Laboratory/National Research Council Postdoctoral Fellow.
Chemistry Division, Code 6100, U.S. Naval Research Laboratory, Washington, DC 20375, USA.
Plasmonics. 2017 Jun;12(3):743-750. doi: 10.1007/s11468-016-0321-3. Epub 2016 Sep 4.
Solution-deposited nanoscale films of RuO ("nanoskins") are effective transparent conductors once calcined to 200 °C. Upon heating the nanoskins to higher temperature the nanoskins show increased transmission at 550 nm. Electronic microscopy and X-ray diffraction show that the changes in the optical spectrum are accompanied by the formation of rutile RuO nanoparticles. The mechanism for the spectral evolution is clearly observed with ultrafast optical measurements. Following excitation at 400 nm, nanoskins calcined at higher temperatures show increased transmission above 650 nm, consistent with the photobleaching of a surface-plasmon resonance (SPR) band. Calculations based on the optical constants of RuO substantiate the presence of SPR absorption. Sheet resistance and transient terahertz photoconductivity measurements establish that the nanoskins electrically de-wire into separated particles. The plasmonic behavior of the nanoskins has implications their use in a range of optical and electrochemical applications.
通过溶液沉积法制备的RuO纳米级薄膜（“纳米皮”）在煅烧至200°C后是有效的透明导体。将纳米皮加热到更高温度时，纳米皮在550nm处的透过率增加。电子显微镜和X射线衍射表明，光谱变化伴随着金红石型RuO纳米颗粒的形成。通过超快光学测量可以清楚地观察到光谱演化的机制。在400nm激发后，在较高温度下煅烧的纳米皮在650nm以上的透过率增加，这与表面等离子体共振（SPR）带的光漂白一致。基于RuO光学常数的计算证实了SPR吸收的存在。表面电阻和瞬态太赫兹光电导率测量表明，纳米皮在电学上解缠为分离的颗粒。纳米皮的等离子体行为对其在一系列光学和电化学应用中的使用具有重要意义。
