Interface studies of rare earth oxides on silicon and germanium substrates
Interface studies of rare earth oxides on silicon and germanium substrates
... dielectric constant.22,25 Table 2.1: Summary of the dielectric constant (k), band gap (Eg), conduction (CBO) and valence band offsets (VBO) on Si values for rare earth (RE) oxides and transition metal ... explanation as to why rare earth oxides form good interfaces with Ge 2.1.1 Rare earth oxides as second generation high-k dielectrics The criterion of thermodynami...
Ngày tải lên: 09/09/2015, 17:54
Báo cáo hóa học: "Influence of Rare Earth Doping on the Structural and Catalytic Properties of Nanostructured Tin Oxide" docx
... Sn#1000 Conversion/Selectivity (%) Conversion/Selectivity (%) ð1Þ The effects of the process of segregation and de-mixing of these rare earths on the SnO2 catalytic properties were studied and compared ... modification of the nanostructure and the basic sites of the particles Another phenomenon starts to occur on the surface of doped samples, a segrega...
Ngày tải lên: 22/06/2014, 01:20
Báo cáo hóa học: " Photoelectrochemical studies of DNA-tagged biomolecules on Au and Au/Ni/Au multilayer nanowires" docx
... images of Au and Au/ Ni /Au NWs with tagging; (d) and (f) fluorescence images of Au and Au/ Ni /Au NWs with tagging upon green light excitation of 532 nm NWs A distinct image of Au maximum emission and ... DNA, (iv) Au/ Ni /Au NWs with tagging of cy3-dye attached DNA PL images of (v) Au NWs and (vi) distinct difference of Au and Ni in Au/ Ni /Au mu...
Ngày tải lên: 20/06/2014, 22:20
Structural, electrical and optical studies on the effects of rapid thermal processing on silicon germanium carbon films
... STRUCTURAL, ELECTRICAL AND OPTICAL STUDIES ON THE EFFECTS OF RAPID THERMAL PROCESSING ON SILICONGERMANIUM -CARBON FILMS FENG WEI (M Eng, XJTU) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF ... was explained based on the theory of binary alloy oxidation and the consideration of large difference in the heat of formation of SiO2 and GeO2 R...
Ngày tải lên: 17/09/2015, 17:18
A new mechanism for modulation of schottky barrier heights on silicon nanowires
... in contact with the end surfaces of the wires were obtained by annealing at 250 1C for 20 Using the Pd2Si contacts as source and drain and the silicon substrate as a back-gate, a transistor configuration ... configuration, contact geometry and charge distribution are demonstrated in Fig The preparation started from an SOI wafer with a silicon film thickness of 55 nm and a burie...
Ngày tải lên: 16/03/2014, 15:14
Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 1
... concept of the self- assembled monolayers (SAMs) is primarily introduced by Zisman in 19 46 [12 , 13 ] The traditional SAMs is an organized layer of INTRODUCTION amphiphilic molecules in which one ... development, and biological process Works of thiols adsorbed on gold surfaces by Nuzzo and Allara [13 , 15 ] in the early 19 80s and trichlorosilanes on silicon oxide by...
Ngày tải lên: 14/09/2015, 08:37
Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 2
... Valiyaveettil Suresh’s group C12H25 C12H25 C12H25 N C12H25 C12H25 C12H25 N C12H25 C12H25 C12H25 C12H25 CPAH CHBC C12H25 Br N Br N C12H25 C12H25 C12H25 CHBC2 N C12H25 N C12H25 TCC 34 EXPERIMENTAL R ... C12H25 C12H25 N C12H25 C12H25 N C12H25 C12H25 CHBC3 Derivatives of perylene by Prof Valiyaveettil Suresh’s group C12H25 N O O O C12H25 N O O C12H25 N O S Br Br S O N O C12H25 O O DDPER N O C12...
Ngày tải lên: 14/09/2015, 08:37
Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 3
... calibration of the “A” scanner for scanning tunneling microscope function 3. 3.2 Calibration Procedures The calibration of STM can be conducted with a standard sample: highly ordered pyrolytic graphite ... bright carbon atoms was 0.267nm 44 CALIBRATION Fig 3. 4 Section Analysis of the STM image in Fig 3. 3 along the orientation of the white arrow Fig 3. 5 shows the stand...
Ngày tải lên: 14/09/2015, 08:37
Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 4
... to verify the existence of interaction between the adsorbate and graphite surface 4. 2 STM Results and Computational Simulations 4. 2.1 Solution Preparation Three solutions of fatty acids in phenyloctane ... interaction as shown in Table 4. 2 Our computational simulation does not reveal the physisorption route and steps of the monolayers formation, instead, it can onl...
Ngày tải lên: 14/09/2015, 08:37
Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 5
... steric repulsion Fig 5. 4 The molecular model of the DDPER arrays 5. 4 The Computational Simulation 5. 4.1 Conformation of gas phase DDPER and its derivatives Building of the computational model started ... interaction 83 FORMATION OF SAMs CONRTOLLED BY STERIC EFFECTS 5. 4.2 DDPER/HOPG vs S170/HOPG Computational simulation was applied to compare the adsorption energies...
Ngày tải lên: 14/09/2015, 08:37
Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 6
... 3.900.80nm and 2.950 .60 nm N N N Fig 6. 4 Left: High resolution image of HHB monolayers: Bright hexagons represent the benzene ring of HHB Right: the molecular configuration of HHB (R-HHB) in monolayers ... N Fig 6. 3 Left: High resolution image of HHB monolayers: Bright hexagons represent the benzene ring of HHB Right: the molecular configuration of HHB (L-HHB) in mon...
Ngày tải lên: 14/09/2015, 08:37
Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 7
... be 7. 4.1 Concentration It is very obvious that the possibility of forming SAMs on HOPG is highly concentration dependent 1 k [ P] When the concentration of the molecule increases, (7- 7) ... observation and equation (7- 10), a rough diagram [Fig 7. 4] of the surface coverage vs [P] was proposed 1 17 FORMATION OF 2D CRYSTALS ON HOPG Fig 7. 4 Propsed diagram of sur...
Ngày tải lên: 14/09/2015, 08:37
Scanning tunneling microscopy studies of self assembled nanostructures on graphite
... Introduction Several studies of metals on graphite have demonstrated the fabrication of different types of nanostructures and behavior of metal atoms on graphite Ganz et al studied the growth of different ... interaction can alter particle shape significantly 1.1 Nucleation and Growth of nanostructures on Inert substrates The understanding of nucleation and growt...
Ngày tải lên: 14/09/2015, 12:09
Growth and characterization of oxide thin films on silicon by pulsed laser deposition
... method of pulsed laser deposition (PLD); investigate the growth mechanism of high quality MgO films on silicon Fabricate highly oriented CoFe2O4 films on silicon with the help of MgO buffer layer and ... thesis 2.1.1 Pulsed- laser deposition One of the most significant approaches to oxide film growth is pulsed- laser deposition Pulsed- laser dep...
Ngày tải lên: 07/10/2015, 10:10
Sincerity and the end of theodicy - three remarks on Levinas and Kant
... itself endlessly Levinas s response to this return of the refuted is twofold On the one hand, it attests to the saying of the said, to the fact that the self-contradictory nature of the thesis (the ... constitute an exposition of a subject called to critique Think of that exposition as the description of suffering and that critique as the critique of the...
Ngày tải lên: 01/11/2013, 10:20