2010年10月5日瑞典皇家科學(xué)院宣布，2010年諾貝爾物理學(xué)獎將授予英國曼徹斯特大學(xué)兩位俄裔科學(xué)家：安德烈·海姆和康斯坦丁·諾沃肖洛夫，以表彰他們在石墨烯材料開發(fā)領(lǐng)域的“突破性研究”及貢獻。
石墨烯是以sp2軌道雜化的碳原子形成的單層原子蜂窩狀六角平面晶體，六邊形的每個點上都是相同的碳原子。其厚度僅為 0.335 nm，是目前世界上現(xiàn)存最薄的材料。在室溫下，石墨烯傳遞電子的速度比已知導(dǎo)體都快！石墨烯的出現(xiàn)在科學(xué)界激起了巨大的波瀾。人們發(fā)現(xiàn)，石墨烯具有非同尋常的導(dǎo)電性能、超出鋼鐵數(shù)十倍的強度和極好的透光性，它的出現(xiàn)有望在現(xiàn)代電子科技領(lǐng)域引發(fā)新一輪革命。
為此，百靈威與美國著名工廠STREM合作，已引進新產(chǎn)品石墨烯微片，即碳層數(shù)多于10層、厚度在5-100 nm范圍的超薄的石墨烯層狀堆積體。百靈威石墨烯微片，具有優(yōu)異的機械強度、導(dǎo)電、導(dǎo)熱性能；良好的潤滑、耐高溫和抗腐蝕性；超大的形狀比（直徑/厚度比）等特點。石墨烯微片容易與聚合物材料均勻復(fù)合，形成良好的復(fù)合界面，從而易于設(shè)計、制造出高性能復(fù)合材料，應(yīng)用前景非常廣闊。
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產(chǎn)品編號
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產(chǎn)品名稱
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產(chǎn)品規(guī)格
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包裝
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石墨烯微片
Graphene nanoplatelets
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6-8 nm thick x 5 microns wide
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25 g
100 g
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石墨烯微片
Graphene nanoplatelets
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6-8 nm thick x 15 microns wide
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25 g
100 g
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石墨烯微片
Graphene nanoplatelets
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6-8 nm thick x 25 microns wide
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25 g
100 g
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石墨烯微片聚集體
Graphene nanoplatelets aggregates
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sub-micron particles, surface area 300 m2/g
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25 g
100 g
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石墨烯微片聚集體
Graphene nanoplatelets aggregates
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sub-micron particles, surface area 500 m2/g
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25 g
100 g
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石墨烯微片聚集體
Graphene nanoplatelets aggregates
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sub-micron particles, surface area 750 m2/g
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25 g
100 g
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產(chǎn)品資訊
百靈威量子點——一種理想的新型納米材料
量子點，又可稱為納米晶，是一種由II－VI族或III－V族元素組成的納米顆粒。量子點的粒徑一般介于1～10 nm之間，由于電子和空穴被量子限域，連續(xù)的能帶結(jié)構(gòu)變成具有分子特性的分立能級結(jié)構(gòu)，受激后可以發(fā)射熒光。量子點具有吸收光譜寬、發(fā)射光譜窄而對稱、生物相容性好、熒光壽命長等優(yōu)點，在太陽能電池、發(fā)光器件和生物標記等領(lǐng)域具有廣泛的應(yīng)用前景。
百靈威與美國著名工廠STREM合作，引進的新產(chǎn)品量子點，不僅是一種新型納米材料，還是一種理想的熒光探針。
CdSe/CdS/ZnS
Strem offers the following Quantum Dots
Core: CdSe
Core/Shell: CdSe/CdS
Core/Shell/Shell: CdSe/CdS/ZnS
The CdSe core is highly uniform with a narrow particle size distribution (±10%). The CdS shell is less than 1nm and stabilizes the core. The second shell of ZnS provides additional stability and is 1-2 nm thick.
Product characteristics:
High Quantum Yield- Longer term stability
- Scalability (produced via continuous flow)
- High batch-to-batch reproducibility (TEM available for each lot)
- Emission range 500-650nm
- Homogeneous dispersions in different non-polar solvents possible
- Flexibility for ink or composite preparation
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Structure
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Ligand Capping Agent
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Stability of Dispersions
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Quantum Yield
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Emission Range
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CdSe
core
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Oleylamine
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6 months
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> 10%
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500-625 nm
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CdSe/CdS
core/shell
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Oleylamine
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> 6 months
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> 30%
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550-625 nm
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CdSe/CdS/ZnS
core/shell/shell
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Hexadecylamine
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> 12 months
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> 30-40%
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525-650 nm
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uantum dots manufactured by and registered trademarks owned by Center for Applied Nanotechnology (CAN).
Sold in collaboration with CAN for research purposes.
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Peak Emmission
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Particle Size (diameter)
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Strem Catalog No. (in hexane)+
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Quantum Yield
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CdSe
core
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500 nm
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2.7 nm
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> 10%
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525 nm
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2.8 nm
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> 10%
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550 nm
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3.5 nm
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> 10%
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575 nm
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3.9 nm
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> 10%
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600 nm
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4.7 nm
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> 10%
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625 nm
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5.3 nm
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> 10%
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Kit: 500-625 nm
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> 10%
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Kit contains 5ml of each of the above 6 products. Ligand capping agent oleylamine. Stable in dispersions 6 months.
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CdSe/CdS
core/shell
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550 nm
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3.7 nm
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> 30%
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575 nm
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4.1 nm
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> 30%
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600 nm
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4.9 nm
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> 30%
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625 nm
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5.6 nm
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> 30%
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Kit: 500-625 nm
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> 30%
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Kit contains 1ml of each of the above 4 products. Ligand capping agent oleylamine. Stable in dispersions >6 months.
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CdSe/CdS/ZnS
core/shell/shell
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525 nm
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2.7 nm
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> 40%
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550 nm
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4.6 nm
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> 40%
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575 nm
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5.1 nm
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> 40%
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600 nm
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6.0 nm
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> 40%
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625 nm
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6.6 nm
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> 30%
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650 nm
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8.5 nm
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> 30%
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Kit: 525-650 nm
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> 30 - 40%
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Kit contains 1ml of each of the above 5 products. Ligand capping agent hexadecylamine. Stable in dispersions >12 months.
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* Particle size reported excludes ligand capping agent.
All sizes determined by TEM except for 650nm CdSe/CdS/ZnS which is calculated.
+ Available at nanoparticle concentration of 50μmol per liter.
Store cold in dark under inert atmosphere
Typical spectra for CdSe core quantum dots.
