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laozhang

ӴѧҵҪо, Ϊɽ˵ԵʱȽϲൺൺ
õѧУൺѧڱǰ˺ѧѧѧԺĽ
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MOLECULESеĽκ·Ľڿ
һĲʿоҲ簡ѧƸģ

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1    *ڣ11ƪ
ΪӡȣйڿInternational Journal of Molecular 
Sciences

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ݴѧϵΰΥѧµ¼

ߣС

 JOURNAL OF APPLIED PHYSICS 102, 053517 (2007)  
"Enhancement of photoluminescence emission in low-dimensional
structures formed by irradiation of laser" һ߹ݴѧ
ϵΰWei-Qi Huang,Li Xu, Ke-Yue Wu, Shi-Rong Liu
 
УڶڵΣ
 
Scanning electron microscopy (EPMA-1600) was used
to observe the low-dimensional nanostructures of the
samples. The PL spectra of the samples under the 514 nm
excitation were measured by using RENISHAW Raman Systems
in which the wavelength of the scanning spectra can be
from 200 to 800 nm for measuring Stokes peaks and anti-
Stokes peaks, and the spot diameter of laser beam for exciting
can reach to 1 um.[6C11]
 
 [6-11] [8-10] 
 
[8] S. S. Li, et al, Phys. Rev. B 71, 155301 (2005).
[9] S.S. Li, et al, Appl. Phys. Lett. 87, 043 (2005).
[10] S. S. Li, et al, J. Appl. Phys. 98, 083704 (2005).
 
Щõ [8,10] Ƕֺ޹ϵҸҲûκ
ط [8-10] Щˡ
 
 [8] ڿĿժҪ
 
PHYSICAL REVIEW B 71, 155301 (2005)
 
Effective-mass theory for hierarchical self-assembly of GaAs/AlxGa1.xAs quantum dots
 
The electronic structures in the hierarchical self-assembly of GaAs/AlxGa1.xAs quantum dots are investigated
theoretically in the framework of effective-mass envelope function theory. The electron and hole energy
levels and optical transition energies are calculated. In our calculation, the effect of finite offset, valence-band
mixing, the effects due to the different effective masses of electrons and holes in different regions, and the real
quantum dot structures are all taken into account. The results show that s1d electronic energy levels decrease
monotonically, and the energy difference between the energy levels increases as the GaAs quantum dot sQDd
height increases; s2d strong state mixing is found between the different energy levels as the GaAs QD width
changes; s3d the hole energy levels decrease more quickly than those of the electrons as the GaAs QD size
increases; s4d in excited states, the hole energy levels are closer to each other than the electron ones; s5d the
first heavy- and light-hole transition energies are very close. Our theoretical results agree well with the
available experimental data. Our calculated results are useful for the application of the hierarchical selfassembly
of GaAs/AlxGa1.xAs quantum dots to photoelectric devices.
 
 [9] ûҵ
 
 [10] ڿĿժҪ
 
JOURNAL OF APPLIED PHYSICS 98, 083704 (2005)
 
Electron transport through hierarchical self-assembly of GaAs/AlxGa1.xAs
quantum dots
 
The transmission of electrons through a hierarchical self-assembly of GaAs/AlxGa1.xAs quantum
dots (QDs) is calculated using the coupled-channel recursion method. Our results reveal that the
number of conductance peaks does not change when the barrier widths change, but the intensities
decrease as the barrier widths increase. The conductance peaks will shift towards low Fermi
energies as the transverse width of GaAs QD increases, as the thickness of GaAs quantum well
increases, or as the height of GaAs QDs decreases. Our calculated results may be useful in the
application of QDs to photoelectric devices.

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ӻǿѧҢ

ߣlw56102

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Ҫפ˵ͨȻտѧҢĽͻһؼҵ
Դ෴ĲԴѧҢһС˵ΪܵëϸѪ
ܶڵĿź͹رչһС࣬γɵĲĲԴλ
פִҽѧëϸѪܿյΪ֤ݣ
û˵νСƵʲôģǲǺƵһ
һνפɾ޷γˡʵϣëϸѪܿź͹
ղûһͳһĿڣֻǹ̶״̬±һëϸѪܿţһ
ëϸѪܹرգź͹رյıڰ״̬ǹ̶ģĶһ
ԵĲѧҢҲûй۲쵽෽෴ĲԴС
ĸֻΪԲԼפ֮˵ëϸѪܴһ߶ѡں
˵С඼ᵽλãӶı仯פԭ
޷ҹ򵥿һ½ͼ֪ƢС࣬ЩС
ĲҪﵽλúĲҲͬģ޷νפ

ѧҢӿˣҽҲҪ˷ʱȥ
˷һ˵ʱ㹻ˡ˵һ䣬ѧҢѧ
⣬򵥵ҽѧҲ֪˭ΪЩĳ
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״¶֫һֱÿ
һëϸѪܡҽѧԺı֪״򲻸ó
ൽ֫Լ౾ëϸѪܵ·ϵġ 

(XYS20080504)

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ձϴʸߵþˣҳԳҩй

ΰйҩ۴½ҩгҩҲеĳ
вҩǱʱ˵ǱƷܶйΪԺ⣬
вԼȥйҩҩȥЩҲҩˡ
һԭйձĴǡûҲҪҩ
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ʮֺ棬ϴôϴʥǲϴĽͣҽԱ
СܲǰۣӣһӽӶһӾȻ
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ЩϴҽƱգMedicareղس̶Ȱ
ϴڣһСʱ12СʱȣеĲÿΣе챨
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ԣ͵öƤ֮ࡣϴǿſռ䣬ҽԺ˴˸
һŲ룬໥ԷϴʱڲϿӣȻ˯
ٽ̸ҽԱ찲ܿɭDiane Jackson˵ɻ
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ҽʦУJoseph Leeָಡɼ಻㡣Ϊû
ռȫڹϴҹ˯ϴNocturnal Hemodialysis
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ÿҶУϼݽ25ҡ

ಡ֢״ԣҺݡˮסѪѹƶѪ
ƣ֢״ʱпಡ˶ڼ൱Ҫ

ĿǰݡմݺάݽԻƹಡԤѧ
ЭṩҽѧѶϢиѪѹ򲡡ߵ̴
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(XYS20080504)

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ձߵ⣬ƷרҵķࣨNon-fiction
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ǳƷӦӯΪĿĵģһƷһ棬
սһֿգȻۺ֤ݣѧ顣
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棬ҪѧƷѧƷΪ̿ר࣬
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ΪǲҪԭԹļʷعˡѧ
µȣӭʱŻ⣬֪ʿ׫дۻȷ
ݷḻʱḻսȤζĶƷǳԣݲǳ



ûаݶմҿƷӡ̵ƷJared 
DiamondƷGun Germs and Steel ͸
ѧңڶצ۵ಿĹ۲죬˵෢չеľ
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˵⻰ԼɪӢѧң38ûʼҿѧԺԺʿƺԺ
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Լɪͽ𡣹ڽʷйƼΪκÿ塢
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۶йƼķչ֣ԽͻȻת̵Ǳ߶
۸ȤҪԭйľйĵɵģŷб
˶ѡΪйƼ˼ԭڡ¡ĹԺ
ϱרҵϸɡ

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棬ǰνܼʱõľǳԵԡб棬ǰ˽
ƣҲǳԡκϣĶڣӦǳԡͬʱƷҪ
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ժԡѧչдĿնġͨĿѧҩ 
񡷣ǰĹ۵Ӱġ

֪ʶƹЭᡱʮ͵ӢѧͯмΪԶӰ죬
ҲΪŷЧЭһֱƶսԭ

һսѧҪѡһСȥרоǰ
й㷺֪ʶΪѧо֪ʶĻãһ
ΪһʡڿѧҵУоֹȻ̽һ
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ڶߵȿѧоɹǿսĺòϡΪ ѧо
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󣬱յɫӦȷǳԡȤζʷ
ḻרҵս߶רҵȤյҪ

ŪԻ

ʶ⣬
ǳԾʶ
ƽʵ֪
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(XYS20080504)

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ϴѧΪѧı

νhttp://blog.sina.com.cn/duanjianzhong

˵ϴѧѧνļܣΪѧ˼άʽҲ
Ŀ⣬Ϊ˵ѧĿƺͲʵõѧƵѧľҵǰ
(ΪĿܽƣȵ)ߵѧУĻʽίԱ
ԺʿҲƴѧҪѧáҡáΪãԻ
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һ˵롮ѧ˼άʽҲ͸һЩĩpܵĻ
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ռٱ͸繤ѧܹʱϵ仯ɣȵȡ
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ȵȣЩѧ۵ĻǿסķԷġ
ġķѧſγ̣ѧԺд»ûô
Ϊ϶ûѧѧȴǧķġ

ƽӵܵļҳͿǣٴȰǱѧܵרҵ
־Ըʱǵĳʶܴ°רҵжϸ߳ɣļרҵָ
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֣϶Ϊ

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2008425աձ桷ʱļһ
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ԹйϡС֪ʶ˵һһеġ
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һûáѧʦ顢鵽ز
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1935꣬24ļ˹¹ʼ˳ʮꡢɴ
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20058£ڲ֮д̩͡ɽ̡ĭԱȸߣ
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У̫ΪˮʣΪˮʡڽ
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٣ǧǡ91䲻ʧ֮ģ
½ý幫ײߣ

ǵĹܷҵԴͷܡܡ
ܡܷԺץƶ淨ŷ
ų淨ȣʹܷܷ涨Ȩõʵķɱϡ
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ϰлĴͳ£ԴԶΪϲϳ
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(XYS20080504)

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ߣeagle

Ƿ,˶ûѡȨ,־Ȩ
־ųδ֪δ֪ԨĿ־Իʹʽڽ̰
ķչԭʼ˼Ķ
ĴͳȻΪԼޱ޼ʵҸУԼ
ġȻضиߵ֣֮ڽϸ߷չ׶ε
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Ӷ𣬽ɵԤѳΪʵ

ҵй½Ȼָй
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Եιָµĸʵʩʲô˲ġʵȻ
ڴѧУ԰ȴԼĶԵġҳϡǴ۵ԡߡ
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ǰǷТģҪٴ졣ֽйũһЩطɥʱ
Ǯְҵɥ޵ϰףһ͹ҵνТ

ִѧۼΪʲô
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Լϵķ˼ʵĺгȻƽ⡣Ȼͨ
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̫ıҪȥЮרƵڽ̡ЩԸŰҮյ
ŮǶԣƵ뷨ǲġҪڵϽ衰áҲҪ
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(XYS20080504)

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ɶء۵İС

Samuel

ڡ۵İС(XYS080503)Уй˿ظCNNĲΪ
˵ɡЩ̲ʿԱǣҲһǲʲôǰİ
ԱѡҾôϸˡҿפʹݵ֪ӣ
룺ɶ

1.Ҳ˵ԭ治ʸǵȻġйȥҲʸأChinese
ֲֻסйһ棬ûΪܵChineseͬ
˺ҲԼȥظ档

2.ܶй˶֪ġŦԼʱİ˵ˣ湫Ҫԭ֤
actual maliceҪ֤ϼѡ˵ʷ۵

3.ʹֹ˾һҲӮÿҲкܶȥ̬ѡ

פʹʵںѹȻģͻдԼ˵ģ
˽½ԭ泷߶ѡ

PS:ŦԼݵresidentһȥѧ˶ֻ֪Ҫ֤
סǸ30죬ǾݵresidentǸݵļա̿ڲӰ
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(XYS20080504)

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ģй

ߣflyisland

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ŰģMSN => MSNM$˾ => M$˾ => һ
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ⲻǳˡģй ˼ˣоǱȵйĻҪ
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(XYS20080504)

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ѰܷԻ̬˼

John

ڶѰĿˮսûȡѵŭѰ
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ʣƾЩˮƽ仰е壬ɡƾйҽ״
˽⡱Ѱ֪᲻ܣ

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ˣûжԻĽȫˣӪ˶Լûע
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prospective randomized comparison of laparoscopic appendectomy with 
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ѧĻĲ˺ͼȫЩ붼Ҫ15-20Ӱɣÿ
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