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Two dimensional molecular self assemblies on surfaces studied by low temperature scanning tunneling microscopy

Two dimensional molecular self assemblies on surfaces studied by low temperature scanning tunneling microscopy

Two dimensional molecular self assemblies on surfaces studied by low temperature scanning tunneling microscopy

... controls the molecular switching …………………………………………… 148 ⅹⅶ LIST OF ABBREVIATIONS 2D LT-STM Two- Dimensional Low Temperature Scanning Tunneling Microscopy STS Scanning Tunneling Spectroscopy MBE Molecular ... Field Ion Microscopy AFM Atomic Force Microscope SEM Scanning Electron Microscopy TEM Transmission Electron Microscopy NFSOM Near-Field Scanning Optical Mic...
Ngày tải lên : 11/09/2015, 09:58
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STRUCTURES OF ADSORBED HALIDE ANIONS ON a COPPER ELECTRODE STUDIED BY IN SITU SCANNING TUNNELING MICROSCOPY

STRUCTURES OF ADSORBED HALIDE ANIONS ON a COPPER ELECTRODE STUDIED BY IN SITU SCANNING TUNNELING MICROSCOPY

... electrode For the adsorption of iodide anions on the same substrate surface the supporting electrolyte (10 mM HCl) was replaced by STRUCTURES OF ADSORBED HALIDE ANIONS ON A COPPER ELECTRODE STUDIED ... IV CONCLUSION The electrochemical behaviors of a Cu(100) electrode in pure dilute HCl and iodide containing HCl solutions was investigated by in situ...
Ngày tải lên : 30/10/2015, 20:57
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 1

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
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 2

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
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 3

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
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 4

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
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 5

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
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 6

Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 6

... 3.900.80nm and 2.950 .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
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 7

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
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Development of a two dimensional wave model based on the extended boussinesq equations

Development of a two dimensional wave model based on the extended boussinesq equations
... DEVELOPMENT OF A TWO- DIMENSIONAL WAVE MODEL BASED ON THE EXTENDED BOUSSINESQ EQUATIONS MAN CHUANJIAN (B Eng., Tsinghua) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ... requires the information of wave conditions in the region of interest Usually, wave characteristics are collected offshore and it is necessary to tran...
Ngày tải lên : 04/10/2015, 15:52
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Báo cáo y học: "Segment-orientated analysis of two-dimensional strain and strain rate as assessed by velocity vector imaging in patients with acute myocardial infarction"

Báo cáo y học: "Segment-orientated analysis of two-dimensional strain and strain rate as assessed by velocity vector imaging in patients with acute myocardial infarction"
... pressure, and heart rate Conclusions Velocity Vector imaging (VVI) is a clinically feasible approach for strain measurements in infarcted myocardium allowing an accurate assessment of global and regional ... Duan Y, Yuan L, Yang Y Velocity vector imaging in assessing the regional systolic function of patients with post myocardial infarction Echocardiograph...
Ngày tải lên : 25/10/2012, 11:15
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Scanning tunneling microscopy studies of self assembled nanostructures on graphite

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
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Báo cáo hóa học: " Study of the formation processes of gold droplet arrays on Si substrates by high temperature anneals" docx

Báo cáo hóa học: " Study of the formation processes of gold droplet arrays on Si substrates by high temperature anneals" docx
... depending on the state of the oxide on the Si wafer The AFM images of gold films deposited on the Si surfaces with different states of oxide coverage are shown in Figure The size distributions of the ... studies The authors believe that it can be related to the transition processes during sample heating Conclusions In this study, the detailed investi...
Ngày tải lên : 21/06/2014, 05:20
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photocatalysis of two-dimensional honeycomb-like zno nanowalls on

photocatalysis of two-dimensional honeycomb-like zno nanowalls on
... degradation efficiency will also be increasing in such conditions 3.4 Effect of the concentration of the growth solution on performances of two-dimensional honeycomb-like ZnO nanowalls/ zeolite Fig demonstrates ... Effect of reaction time on performances of two-dimensional honeycomb-like ZnO nanowalls/ zeolite Fig Decoloration of methylene blue for ZnO/ zeolite w...
Ngày tải lên : 06/05/2014, 13:26
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Báo cáo sinh học: " Research Article Two-Dimensional Harmonic Retrieval in Correlative Noise Based on Genetic Algorithm" pdf

Báo cáo sinh học: " Research Article Two-Dimensional Harmonic Retrieval in Correlative Noise Based on Genetic Algorithm" pdf
... Wang, Two-dimensional harmonics retrieval in correlative multiplication and additive noise, ” in Proceedings of the 7th International Conference on Signal Processing (ICSP ’04), pp 264–268, Beijing, ... 2006 (Chinese) [12] J Xu, S.-X Wang, and H Wang, Harmonic retrieval and nonlinear frequency-coupled harmonics in the complex noise, ” Journal of Electronics, vol 31, pp 117–1...
Ngày tải lên : 21/06/2014, 16:20
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