Ferroelectric gating of graphene 4

... ferroelectric thin film of poly(vinylidene fluoride-trifluoroethylene) 44 Figure 4. 3: (a) Sample geometry of a finished graphene -ferroelectric memory device (b) Optical image of a graphene samples showing ... linear slope of the R vs VBG 45 Rmax R (k ) R/R>350% RPr Rmin -1 =700 cm V s -80 -40 V TG -1 40 80 (V) Figure 4. 4: Electric hysteresis loop; R as a function of VTG f...

Ngày tải lên: 09/09/2015, 10:22

... 199 3 [5] S Iijima Helical microtubules of graphitic carbon Nature, 354:56, 199 1 [6] P R Wallace The band structure of graphite Phys Rev, 71:622, 194 7 [7] A K Geim and K S Novoselov The rise of ... potential research topics involving graphene and ferroelectric material 9. 3.1 Gate-tunable graphene -ferroelectric photonics Over the past seven years, the main focus of graphen...

Ngày tải lên: 09/09/2015, 10:18

... that we are using is ferroelectric copolymer P(VDF-TrFE) 31 a b Figure 3. 5: (a) Schematics of a graphene -ferroelectric p-n-p junctions; (b) Optical image of a graphene -ferroelectric p-n-p junction ... lattice [49, 50, 80] 30 3. 2 Fabrication of graphene field effect transistor GFET 3. 2.1 GFET devices using mechanically exfoliated graphene After graphene is transferr...

Ngày tải lên: 09/09/2015, 10:21

... 11 5 11 6 11 6 11 7 11 8 Bibliography 11 9 Publications 14 1 Patents 14 3 vii Acknowledgements Over my four-year Ph.D time, I would like to express my deep thanks to my advisor, ¨ Prof Barbaros ... 10 9 10 9 11 1 11 1 11 3 9.2.3 Can we achieve less than 10 0 Ω/2 sheet resistance in CVD graphene? 9.3 Future outlook 9.3 .1 Gate-tunable graphene -ferroelectric ... 12 12 1...

Ngày tải lên: 09/09/2015, 10:21

... Intensity (a.u.) a G P(VDF-TrFE) 1530 1 560 1590 162 0 165 0 Raman Shift (cm -1 ) 168 0 c 1.0 0.0 -1.0 -2.0 -1.0 -0.5 0.0 0.5 1.0 Voltage (V) Figure 6. 6: (a) XRD results of both P(VDF-TrFE) foil and house-produced ... excellent mechanical support for graphene (Fig 6. 3a) Fig 6. 3b shows the graphene- P(VDF-TrFE) hybrid structure on top of PET substrates The transmission spectra as...

Ngày tải lên: 09/09/2015, 10:21

... Cu-CVD graphene on PZT As shown in Fig 7. 1e, G peaks of Cu-CVD graphene on PZT show a noticeable red shift of ∼ 10 cm−1 and broadening of full width at half maximum (FWHM), compared to CVD graphene ... cm−2 (Fig 7. 2b and 7. 2c) This indicates the electron-hole puddle intensity of graphene on PZT is an order -of- magnitude higher than graphene on SiO2 The strong charge i...

Ngày tải lên: 09/09/2015, 10:22

... over 50 - 350 K and 1012 cm−2 ranges (Fig 5. 5e and 5. 5f) [34] a c 12 e -2 2.0 x 10 cm , S1 -2 -2 12 -2 12 400 50 40 12 12 60 -2 2.0 x 10 cm , S2 200 400 20 2 .5 x 10 cm 100 -3 -4 -2 -1 12 150 200 250 ... γT /ne, and 70 SLG 16 B=9T T = 3 .5 K c e 1.8 SLG 60 1.6 40 -0.3 0.0 40 -3 60 d -8 20 VBG (V) 40 60 -2 12 -2 -2 3.8 (10 cm ) 0.2 0.4 50 150 250 -2 350 50 150 250 T (K) f BLG 400 BLG...

Ngày tải lên: 09/09/2015, 10:22

... Fig 8. 7a Fig 8. 7b shows the pure PET substrate signal 1 08 (b) Transmittance Transmittance (a) Figure 8. 7: a: Optical transmittance of graphene as a function of strain and polarization angle of ... image of graphene sample after partially define HSQ layer (d) AFM image of graphene sample after P(VDF-TrFE) spin coating (e) R vs VBG of graphene samples before patterni...

Ngày tải lên: 09/09/2015, 10:22

... shows graphene lattice; (c) and (d) distributions of cluster volume on 63 and graphene terrace respectively; and (e) line profiles of unadorned area of 63 (blue) and graphene (dotted line) Fig 4. 17a ... SiC 4. 2Å SiC SiC SiC 3.3Å 4. 2Å 3.3Å SiC SiC SiC SiC SiC SiC 3.3Å Fig 4. 27 Mechanism in Fig 4. 24 and 4. 26 are extended for third layer graphene formation...

Ngày tải lên: 11/09/2015, 09:59

... VOCABULARY : Fill in each blank with one suitable word UNIT : Mary has the dreamed of becoming an actress when she was at elementary school This kind of work was really I had to spends weeks completing ... your factory UNIT : A computer’s consists things such as mouse, printer, keyboard, VDU With the help of a computer we can send letters and receive letters almost every part of t...

Ngày tải lên: 07/07/2013, 01:27

... effective 41 A make B C go D write 42 A shall B will C should D have 43 A spend B waste C use D relax 44 A.saying B telling C communicating D chatting 45 A wasting B losing C spending D missing 46 – ... food 40 The storm blew a lot of trees down last night A A lot of trees were blown down last night by the storm B A lot of trees were cut down last night C The storm could hve blow...

Ngày tải lên: 21/07/2013, 01:26

... business? A B C D 56 Despite of his bad cough, he kept on smoking A B C D 57 Many films whose are about violence are harmful to children A B C D 58 He has made a lot of mistakes in his writing ... and out in front of him When his wife entered, he saw her for the first time in nine years Doctors confirmed that he has regained his sight and hearing apparently from the flash of lightning...

Ngày tải lên: 21/07/2013, 01:28

Ngày tải lên: 10/11/2013, 19:11

... made of, full of drama, intrigue, and high adventure What goes on here may well be the 10589$ $CH2 02-23- 04 16 :44 :17 PS 22 Golf and the Game of Leadership ultimate example of the heartbeat of ... mission of the organization, concentration on key tasks, and commitment to professional standards of performance.’’ Golf and the Game of Leadership is...

Ngày tải lên: 24/12/2013, 16:15

... …………… .of light from any sharp spectral line The standard meter in France has been …………… in terms of the number of wavelengths of light of a certain …………….line Exercise 3: Decide whether each of ... the time; Note that, as for before and after, they can not only function as conjunctions of time but also as prepositions of time: a He jumped to the conclusion before any of hi...

Ngày tải lên: 26/01/2014, 00:20