Did you know ? If you order before Friday 14h we deliver 90PCT of the the time next Tuesday, GENTAUR another in time delivery

Pubmed ID :29916516
Publication Date : //

Formation of nanocrystalline graphene on germanium.


Graphitization of a polymer layer provides a convenient route to synthesize nanocrystalline graphene on dielectric surfaces. The transparent and conducting wafer scale material is of interest as a membrane and a coating, and for the generation and detection of light, or strain sensing. In this work, we study the formation of nanocrystalline graphene on germanium, a surface which promotes the CVD synthesis of monocrystalline graphene. The surprising result that we obtained through graphitization is the formation of cavities in germanium, over which nanocrystalline graphene is suspended. Depending on the crystallographic orientation of the germanium surface, either trenches in (110)-Ge or pits in (111)-Ge are formed, and their dimensions depend on the graphitization temperature. Using Raman spatial imaging, we can show that nanocrystalline graphene is formed across the entire wafer in spite of the cavity formation. Interestingly, the Raman intensity is suppressed when the material is supported by germanium and is enhanced when the material is suspended. Through simulations, we can show that these effects are induced by the high refractive index of germanium and by interferences of the light field depending on the spacing between graphene and germanium. Using atomic force and scanning electron microscopy, we determined that ripples in the suspended material are induced by the mismatch of thermal expansion coefficients. Our results provide a new route to lithography-free fabrication of suspended membranes.

Authors : Yekani Rana , Rusak Evgenia , Riaz Adnan , Felten Alexandre , Breitung Ben , Dehm Simone , Perera Delwin , Rohrer Jochen , Rockstuhl Carsten , Krupke Ralph ,

Related products :

Catalog number Product name Quantity
12398-45-7 germanium dipotassium trioxide germanium dipotassiu 1g
12025-12-6 Germanium magnesium trioxide Germanium magnesiu 1g
14165-55-0 Germanium(IV) ethoxide Germanium(IV) ethylat 1g
12065-11-1 Germanium(IV) selenide Germanium diselenide 1g
93840-00-7 germanium(4+) 2_methoxyethanolate germanium(4+) 2_meth 1g
29850-62-2 germanium(2+) phosphonate(1 1) germanium(2+) phosph 1g
7783-58-6 Germanium tetrafluoride Germanium tetrafluorid 1g
992-91-6 Germanium(IV) methoxide Germanium(IV) methox 1g
26-827 MLF1 is involved in lineage commitment of primary hemopoietic progenitors by restricting erythroid formation and enhancing myeloid formation. It interferes with erythopoietin-induced erythroid termina 0.05 mg
67939-78-0 germanium tetrakis(benzyl alcoholate) germanium tetrakis(ben 1g
12315-28-5 Lithium germanium oxide Lithium germanium oxi 1g
12025-19-3 germanium disodium trioxide germanium disodium tri 1g
GO1-PG-1 Graphene oxide, PEG labeled 1 mL
GO1-RD-1 Graphene oxide, reduced 50 mg
GO1-FC-1 Graphene oxide, fluorescein labeled 1 mL
GO1-TH-1 Graphene oxide, thiol functional 1 mL
GO1-AQ-2 Graphene oxide, aqueous solution 100 mL
GO1-BN-1 Graphene oxide, biotin labeled 1 mL
GO1-AK-1 Graphene oxide, alkyne functional 1 mL
GO1-100MG Graphene oxide, solid 25 mg
GO1-AM-1 Graphene oxide, amine functional 1 mL
GO1-OH-1 Graphene oxide, hydroxyl functional 5 mL
GO1-GLU-1 Graphene oxide, glucose modified 1 mL
GO1-AQ-1 Graphene oxide, aqueous solution 20 mL
GO1-AQ-5ML Graphene oxide, aqueous solution 5 mL


 

GENTAUR Belgium BVBA BE0473327336
Voortstraat 49, 1910 Kampenhout BELGIUM
Tel 0032 16 58 90 45

Fax 0032 16 50 90 45
info@gentaur.com | Gentaur





GENTAUR Ltd.
Howard Frank Turnberry House
1404-1410 High Road
Whetstone London N20 9BH
Tel 020 3393 8531 Fax 020 8445 9411
uk@gentaur.com | Gentaur

 

 




GENTAUR France SARL
9, rue Lagrange, 75005 Paris
Tel 01 43 25 01 50

Fax 01 43 25 01 60
RCS Paris B 484 237 888

SIRET 48423788800017

BNP PARIBAS PARIS PL MAUBERT BIC BNPAFRPPPRG

france@gentaur.com | Gentaur

GENTAUR GmbH
Marienbongard 20
52062 Aachen Deutschland
Support Karolina Elandt
Tel: 0035929830070
Fax: (+49) 241 56 00 47 88

Logistic :0241 40 08 90 86
Bankleitzahl 39050000
IBAN lautet DE8839050000107569353
Handelsregister Aachen HR B 16058
Umsatzsteuer-Identifikationsnummer *** DE 815175831
Steuernummer 201/5961/3925
de@gentaur.com | Gentaur

GENTAUR U.S.A
Genprice Inc, Logistics
547, Yurok Circle
San Jose, CA 95123
CA 95123
Tel (408) 780-0908,
Fax (408) 780-0908,
sales@genprice.com

Genprice Inc, Invoices and accounting
6017 Snell Ave, Ste 357
San Jose, CA 95123




GENTAUR Nederland BV
NL850396268B01 KVK nummer 52327027
Kuiper 1
5521 DG Eersel Nederland
Tel:  0208-080893  Fax: 0497-517897
nl@gentaur.com | Gentaur
IBAN: NL04 RABO 0156 9854 62   SWIFT RABONL2U






GENTAUR Spain
tel:0911876558
spain@gentaur.com | Gentaur






ГЕНТАУЪР БЪЛГАРИЯ
ID # 201 358 931 /BULSTAT
София 1000, ул. "Граф Игнатиев" 53 вх. В, ет. 2
Tel 0035924682280 Fax 0035924808322
e-mail: Sofia@gentaur.com | Gentaur
IBAN: BG11FINV91501014771636
BIC: FINVBGSF

GENTAUR Poland Sp. z o.o.


ul. Grunwaldzka 88/A m.2
81-771 Sopot, Poland
TEL Gdansk 058 710 33 44 FAX  058 710 33 48              

poland@gentaur.com | Gentaur

Other countries

Österreich +43720880899

Canada Montreal +15149077481

Ceská republika Praha +420246019719

Danmark +4569918806

Finland Helsset +358942419041

Magyarország Budapest +3619980547

Ireland Dublin+35316526556

Luxembourg+35220880274

Norge Oslo+4721031366

Sverige Stockholm+46852503438

Schweiz Züri+41435006251

US New York+17185132983

GENTAUR Italy
SRL IVA IT03841300167
Piazza Giacomo Matteotti, 6
24122 Bergamo Tel 02 36 00 65 93
Fax 02 36 00 65 94
italia@gentaur.com | Gentaur