Inelastic electron tunnelling

Another technique that has proved useful in establishing chemical bonding of coupling agents at interfaces is inelastic electron tunneling spectroscopy (ITES). For example. Van Velzen [16] examined 3-(trimethoxysilyl)propanethiol by this technique. Approximately monolayer quantities of this silane were adsorbed on the barrier oxide of an aluminum-aluminum oxide-metal tunneling junction two metals were investigated, lead and silver. It was concluded that the silane is... [Pg.417]

The well-known tetrahedral [Co(NCS)4]2 ion has continued to attract attention from analytical chemists, physical chemists, and spectroscopists. The inelastic electron tunneling (IET) spectrum of (Me4N)2[Co(NCS)4] was compared with IR and Raman spectra of the same complex.359 The vibrational bands due to the Me4N+ were prominent in all three spectra, but Coligand stretches were absent from the IET spectra. The lowest 4 42 4T2 electronic transition was strong in the IET spectrum but absent from the IR spectrum. The electric dipole allowed 4A2 4TX electronic transition was observed in both the IET and IR spectra and no fine structure was observed. Complex formation equilibria between Co11 and SCN- were studied calorimetri-... [Pg.38]

Despite the enormous impact that scanning probe methods have had on our understanding of reactions at oxide surfaces, both STM and AFM suffer from the lack of chemical specificity. The application of STM-inelastic electron tunneling spectroscopy is a potential solution as it can be used to measure the vibrational spectrum of individual molecules at the surface [69, 70]. [Pg.236]

Section 5 is on one particular molecule, p-benzene dithiol. This is one of the most commonly studied molecules in molecular electronic transport junctions [7] (although it is also one of the most problematic). Section 6 discusses a separate measurement, inelastic electron tunneling spectroscopy [8, 9] (IETS). This can be quite accurate because it can be done on single molecules at low temperatures. It occurs because of small perturbations on the coherent transport, but it can be very indicative of such issues as the geometrical arrangement in the molecular transport junction, and pathways for electron transport through the molecular structure. [Pg.3]

Fig. 9 Schematic of the inelastic electron tunneling phenomenon. From M. Galperin et al. Science (2008), 319, 1056-1060. Reprinted with permission from AAAS...

Wang W, Lee T, Kretzschmar I, Reed MA (2004) Inelastic electron tunneling spectroscopy of an alkanedithiol self-assembled monolayer. Nano Lett 4(4) 643-646... [Pg.34]

Troisi A, Ratner MA (2005) Modeling the inelastic electron tunneling spectra of molecular wire junctions. Phys Rev B 72(3) 033408... [Pg.34]

Solomon GC, Gagliardi A, Pecchia A, Frauenheim T, Di Carlo A, Reimers JR, Hush NS (2006) Understanding the inelastic electron-tunneling spectra of alkanedithiols on gold. J Chem Phys 124(9) 094704-094710... [Pg.34]

Galperin M, Ratner MA, Nitzan A (2004) Inelastic electron tunneling spectroscopy in molecular junctions peaks and dips. J Chem Phys 121 (23) 11965—11979... [Pg.35]

Nakamura H, Yamashita K, Rocha AR, Sanvito S (2008) Efficient ab initio method for inelastic transport in nanoscale devices analysis of inelastic electron tunneling spectroscopy. Phys Rev B 78(23) 235418-235420... [Pg.35]

Troisi A, Ratner MA (2006) Molecular transport junctions propensity rules for inelastic electron tunneling spectra. Nano Lett 6(8) 1784-1788... [Pg.35]

Honciuc A, Metzger RM, Gong A, Spangler CW (2007) Elastic and inelastic electron tunneling spectroscopy of a new rectifying monolayer. J Am Chem Soc 129 8310-8319... [Pg.83]

Mazur U, Hipps KW (1999) Orbital-mediated tunneling, inelastic electron tunneling, and electrochemical potentials formetal phthalocyanine thin films. J Phys Chem B103 9721-9727... [Pg.83]

Lambe J, Jaklevic RC (1968) Molecular vibration spectra by inelastic electron tunnel. Phys Rev 165 821-832... [Pg.111]

Wang W, Lee T, Reed MA (2003) Elastic and inelastic electron tunneling in alkane self-assembled monolayers. Phys Rev B 68 035416... [Pg.114]

Apart from the more conventional transport measurements of molecular junctions at constant bias voltage, alkane(di)thiols-based molecular junctions were also characterized by transition voltage spectroscopy [258, 259], AC voltage modulation [260], and inelastic electron tunneling spectroscopies [261],... [Pg.146]

Fig. 6 Calculated inelastic electron tunneling spectra with the different stretching distances offset by 2.5 V-1. The geometries with gauche defects are marked in the right margin for stretching 4.0-7.0 A. Highlighted frequency bands are (1) top, 82 (degenerate C-S) and 130 (C-C) meV, and (2) bottom, 75 (nondegenerate C-S), 95 (rock), 165 (wag), and 365 (C-H) meV. (Reprinted with permission from [60])...

Hipps KW, Keder JK (1983) A direct comparison of surface Raman spectroscopy and inelastic electron tunneling spectroscopy. J Phys Chem 87 3187-3189... [Pg.210]

Hipps KW, Mazur U (1993) Inelastic electron tunneling an alternative molecular spectroscopy. J Phys Chem 97 7803-7814... [Pg.210]

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