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red shift 【天文學】紅移,紅向移動。

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The size of the zno nanocrystal grain was so little that the quantum confinement effect should be considered . that makes the band gap wide . atom transfer rate is affected by the substrate temperature , and the average size of the zno nano crystal grain increases with the increasing substrate temperature resulting in the red shift of pl emission position and the narrowness of pl fwhm 低溫生長的氧化鋅晶粒小,考慮到量子限制效應,禁帶寬較大;襯底溫度影響吸附原子遷移能力,隨著溫度升高,晶粒的尺寸增大,分布變的均勻,因而發光峰位隨著襯底溫度的升高而紅移,發光的半高寬變小。

The band was previously associated with f - type color centers and v - type color centers , as analyzed in x - ray irradiated ysz sample . however , the absorption band observed in our experiments has a shift towards the longer wavelength ( red shift ) as comparing with that in the x - ray or neutron irradiated ysz spectra . this shift may mainly due to large local distortions near the f - type centers and the v - type centers and the presence of multiple color centers 本文通過光吸收、光熒光、 tem 、 xps測試及trim96計算分別研究了不同注量xe ~ +注入ysz前后光學性能和缺陷形態變化,以及ni ~ +注入對不同摻雜單晶al _ 2o _ 3結構和光學性能的影響,得到以下結果: ( 1 ) ysz注量達到10 ~ ( 16 ) cm ~ ( - 2 )時,開始出現由f型和v型色心重疊而產生的吸收帶,與x射線、中子輻照相比,重離子輻照產生了更為復雜的缺陷復合體而導致吸收峰紅移。

Under visible light excitation titanic acid and titanate sodium nanotubes showed a relatively intense emission , which red shifts with the increase of excitation wavelength . under humid conditions this photoluminescence of titanic acid nanotubes was not stable . the intensity decreased , and the emission peak was at 480nm , which cannot shift with the change of excitation wavelength 鈦酸和鈦酸鈉納米管在使用可見光激發時,都能產生光致發光現象,當使用不同波長的可見光激發鈦酸和鈦酸鈉納米管時,能夠得到不同強度的發光譜帶,且發光峰的位置隨著激發光的變化發生較大范圍的移動。

The study indicates that self - assembly monolayer membrane of au nanoparticle distributes as sub - monolayer . after au nanoparticles are assembled in multilayer , surface plasma resonance absorption peak got a red shift because of the polarizing effect of the surrounding media and the coupling effect of surface plasma waves between the next au nanoparticles 研究表明au納米粒子的自組裝單層薄膜呈亞單層分布, au納米粒子組裝到多層復合薄膜中后,由于周圍介質的極化作用以及相鄰au納米粒子間的表面等離子體波的耦合作用,表面等離子共振吸收峰出現紅移和展寬。

It was not until 1929 did astronomer edwin p . hubble discovered the red shift of distant galaxies and thereby proved that the universe is expanding in all directions . when einstein heard and fully appreciated these observations , he declared that the inclusion of the cosmological constant was his “ biggest blunder “ 直至一九二九年,天文學家哈勃通過觀測遙遠星系的紅移情況,證明宇宙正向四方八面不斷地膨脹,這時愛因斯坦才猛然自醒,甚至認為當初所提出的恒穩宇宙的結論是他一生中所犯下最愚笨的錯誤。

The uv / vis shows : the uv / vis spectra of the films grown in gas pressure markedly differed from that of the c60 films grown in vacuum , a continuous red shifting of all feature peaks occurs in gas c60 cluster film distinctly ; also the ranges of the red shifting increases little with the increase of gas pressure 紫外可見吸收光譜表明:與真空中制備的c60薄膜比較,發現氮氣氬氣中制備的c60薄膜的紫外可見吸收的相對強度明顯不同,吸收峰位明顯紅移,紅移幅度從幾個納米到二十幾個納米;并且隨著氣氛壓強的增加吸收峰位紅移增加。

In the third chapter , the influence of current density , solution concentration , erosion time and aging in ambient air on the pl spectra of ps suggests that peak would blue shift with current density increasing , and with erosion time and aging time prolonging ; with the increasing of solution concentration , peaks would red shift when solution concentration less than 1 : 1 but blue shift when solution concentration greater than 1 : 1 . above phenomena can be explained by quantum confinement and light center model , but do not deny the action of si - h bonding and defect on the surface in the process of photoluminescence . at present , radiation mechanism is still one of the primary problems in the study of ps 在第z三章中;通過對比,分析了電流密度、陽極化時間、溶液濃度以及自i然氧化時間對多孔硅光致發光光譜的影響,認為在一定的范圍內,多i孔硅的發光峰位會隨電流密度的增大而藍移,要獲得較強的發光,需z要選擇合適的電流密度;隨著腐蝕時間的延長,多孔硅的發光峰位會i發生藍移;當f酸的濃度較小q : 1 )時,峰位隨濃度的增大表現為向i低能移動;而當f酸的濃度較大河山時,峰位隨濃度的增大則表現z為移向高能;多孔硅在空氣中自然氧化;其發光峰位發生藍移,而強i度隨放置時間的延長而降低。

The preparation of gold nanoparticles and the study of their surface plasmon resonance we had preparated gold nanoparticles of different size through two - step approach , one - step approach and seeding growth approach . uv - vis image and tem image indicated that surface plasmon resonance absorbance had a red shift with the argument of the sizeof the gold nanoparticles . 2 金納米粒子的制備及其表面等離子共振吸收特征我們分別用兩步法、一步法和晶種法三種不同的方法制備了小、中、大三種不同粒徑的金納米顆粒,用紫外可見吸收光譜和透射電子顯微鏡進行表征。

The infrared results showed that the ir characteristic value l080cm - lof cubic crystal sio , and the absorption peak 460cm - l of mgf , caused by the interaction between f - - mg ' + - p elastic vibration and photon radiation , appeared in the ir spectra . ellipsometric analysis showed that the typical absorption peaks 58lnm , 589nm and 606nm , resulting from the surface plasma resonance of cu panicles and reflecting the absorption on composite film system , appeared in the extinction coefficient k curves of cu ( voll5 % ) mgf , , cu ( vol20 % ) mgf , and cu ( vol30 % ) mgf , cermet films , respectively . with the component of cu increasing , the peak site presented red shift , which was in accordance to the results of ultraviolet - visible spectra 橢偏測試分析表明: cu ( vol15 ) mgf _ 2 、 cu ( vol20 ) mgf _ 2和cu ( vol30 ) mgf _ 2樣品的消光系數k曲線中出現了反映復合金屬陶瓷體系吸收的由cu金屬顆粒表面等離子體共振引起的吸收峰,峰位分別為581nm 、 589nm和606nm ,呈現紅移,這些與紫外-可見光譜測試結果相一致;此外, cu - mgf _ 2復合納米金屬陶瓷薄膜光學常數的實驗值與考慮尺寸效應修正過的mg理論值總體上符合得很好。

Tem showed that ddp - modified nanoparticles had a similar size with the original nanoparticles . at the same time it had been found that the surface plasmon resonance ( spr ) absorbance of the ddp - modified gold nanoparticles had a large red shift 從表征中可以看金納米顆粒的制備、表面改性及其光學特性的研究到,修飾前后納米顆粒的粒徑沒有發生改變,但表面等離子共振吸收發生了明顯的紅移

Compared with micro - sized y2o3 : eu and gd2o3 : eu phosphors prepared by a conventional method , nanosized y2o3 : eu and gd2o3 : eu synthesized by the present work , gives a clear blue shift in the emission spectrum , and a clear red shift in the excitation spectrum 同時,發現了納米晶一些新奇的發光性質,即:發射光譜藍移現象,激發光譜紅移中電荷遷移帶( ctb )明顯紅移,猝滅濃度提高等。

In the uv light region , the absorption dramatically increases that is caused by the absorption of the films substance , hi addition , as the heat treatment temperature increases the absorption threshold slightly occurs “ red shift “ 在紫外區,薄膜的吸光度急劇增大,而且,隨著熱處理溫度的增加,吸收閾值發生輕微的“紅移” 。這種降低是由于薄膜物質的吸收所致。

The results of rrs demonstrated cds nanoparticles have no influence on the double and triple bonds . the photoluminous measurement showed that cds nanoparticles caused the luminous bands become weak and the red shift 光致發光的測試表明硫化鎘納米粒子使聚雙炔及其甘露糖衍射衍生物混合單分子層的發光強度減弱,并使其發光峰紅移。

Furthermore , the jellium model was used to analyze the characteristic of spr ; the dipole model and the ir spectrum were used to form a new dipole model . , it can be used to explain the mechanism of the red shift 用紅外光譜分析了ddp與金顆粒表面的結合方式,并通過對等離子體振動特點的分析,用諧振子模型解釋了紅移發生的原因

Red shift of the plasmon absorption band was observed after gold particles were assembled into multilayer thin films , and the resulted gold films exhibited a strong surface enhanced raman scattering ( sers ) effect 金納米粒子組裝成膜之后,其表面等離子體共振吸收峰發生紅移,薄膜具有明顯的表面增強拉曼散射( sers )效應。

The experimental results showed that the characteristic pl peak of quantum wells was shifted to longer wavelength ( red shift ) and the intensity was decreased much after fel irradiation 分析光致發光譜,發現量子阱特征峰經過輻照后峰值發生紅移,波形展寬,峰高降低。

The indirect optical gaps of ce02 - tioa complex films induce the absorption edges wavelengths red shift so that the films have excellent properties of ultraviolet absorbing 由于混合薄膜間接躍遷的能隙較小,導致了吸收邊向紅外區遷移,使薄膜有很好的紫外線吸收功能。

The absorption edges wavelengths and cutoff wavelengths of ceo2 - ti2 ; . complex films are red shift , if compared with pure ce02 films or pure tio2 films 混合薄膜的吸收邊波長和截止波長大于純ceo _ 2 、 tio _ 2薄膜,并出現明顯的帶尾現象。

Both the red shift of the plasmon absorption band and the sers effect result from the interparticle interactions of gold nanoparticles within the films 吸收峰紅移及sers效應與薄膜中的金納米粒子間的電磁耦合作用有關。