transition n. 轉(zhuǎn)變,演變,變遷,變化;飛越;過渡期;【音樂】變調(diào),轉(zhuǎn)調(diào);【修辭學(xué)】語次轉(zhuǎn)變;【語法】轉(zhuǎn)換;【物理學(xué)】躍遷;【地質(zhì)學(xué);地理學(xué)】轉(zhuǎn)移層;【建筑】(式樣、時期等的)過渡。 forced transition 【物理學(xué)】受迫躍遷。 a transition period [stage] 過渡時期[階段]。 an age of transition 過渡期。 -al, -ary adj.,-ally adv.
Their molecule structures have strong electron conjugated systems and electron transition between organic ligands and center metal atoms , which result an enhancement of their nonlinear polarizabilities 它的結(jié)構(gòu)中含有較強的電子共軛體系,并且有機配體與中心原子間的電子轉(zhuǎn)移,大大提高了其非線性極化率。
Excited with 228nm , the emission bands centered at about 365nm and 460nm originate from the electron transitions of 1d2 - 1s0 and 3d - 1s0 in ag + respectively , and the emission band at 400nm results from the surface plasma resonance of the silver nanoparticles , which aggregated near the surface of the films 在228nm光激發(fā)下,復(fù)合膜中ag ~ +的電子的~ 1d _ 2 ~ 1s _ 0躍遷和~ 3d ~ 1s _ 0躍遷分別在365和460nm附近發(fā)光,聚集在復(fù)合膜表面的納米銀粒子的表面等離激元共振導(dǎo)致了400nm附近的發(fā)光。
There are distinct changes about shifts or intensity in bulk plasmon , surface plasmon , and interband electron transitions losses as a result of oxidation of specimens , and adsorption and oxidation processes can be studied through these changes . at room temperature , the formation of oxide layers on uranium and uranium - niobium alloys were found to occur rapidly upon exposure to oxygen , and the resultant oxide in each case was near - stoichiometric uo2 . due to formation of niobium oxide in uranium - niobium alloys , the diffusion of o ~ ( - ) ( o ~ ( 2 - ) ) and u ~ ( 4 + ) in the interface region was prevented , and the corrosion resistance of uranium - niobium alloys to oxygen is greatly enhanced by alloying with niobium 研究結(jié)果表明:清潔表面鈮和鈾的體等離子體振蕩所造成的電子能量損失的實驗值與理論計算值較為符合;隨著氧化程度的加劇,表面等離子體( sp ) 、體等離子體( bp )以及價帶電子躍遷所造成電子能量損失的譜峰發(fā)生了明顯的連續(xù)偏移或強度的變化,這些變化可以用來分析鈾及鈾鈮合金的初始氧化過程;室溫下,鈾及鈾鈮合金很容易與氧作用,最終結(jié)果,鈾僅氧化為二氧化鈾,另外,在鈾鈮合金氧化過程中,因為有鈮的氧化物存在,不利于氧和鈾在界面擴散,增強了鈾鈮合金抗氧化性能; eels能獲得樣品表面的信息比aes更為表面,更為靈敏,但由于eels的譜線過于集中,主要在幾十ev以內(nèi),也有不容易區(qū)別和解譜的不足。
A trend of photo - induced electron transition from p - type pc to n - type organic semiconductor was strongly supported by the data of sps and fisps measurements , the wire - like configuration of the tio2 tubule nanostructure benefited the electron - transport thereby improved the efficiency of the disassociation of the photogenerated carriers 表面光電壓測試結(jié)果表明,復(fù)合材料中存在著強烈的從p -型酞菁材料到n -型氧化物半導(dǎo)體材料的光致電荷轉(zhuǎn)移。而且tio _ 2的納米管和線狀結(jié)構(gòu)提高了電子的傳輸效率最為明顯,使光生電荷的分離得到顯著改善。