Molecular materials – towards quantum properties
Molecular materials are ideal candidates for quantum materials because the inherent size of their bricks is well below the quantum limit. In contrast to other material classes, the monodispersity of molecular materials should allow for a large number of identical copies of quantum objects to be produced. Moreover, synthetic control within the molecular bricks enables a fine tuning of the local environment of atoms, in which the quantum character can be exploited. Such an approach may open new avenues to materials where synthetic chemistry meets quantum physics.
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- Published 09 Oct 2014
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Figure 1: (a) Ball-and-stick representation of the MIL-47(V) MOF. Pink, red, black, and white spheres indicat...
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Figure 2: (a) Schematic representation of the five inequivalent magnetic configurations investigated in this ...
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Figure 3: The spin density distribution of the SFM system. The upper chain has an antiferromagnetic spin conf...
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Figure 4: Band structure and density of states (DOS) near the Fermi level for the FM (A) and AF3 (B) spin con...
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- Published 30 Oct 2014
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Figure 1: a) Schematic description of the writing strategy in e-beam lithography. The beam is deflected into ...
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Figure 2: Scanning electron microscope (SEM) images of the gold nanodot arrays fabricated by (a) the “convent...
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Figure 3: a) Plot of the estimated writing times per gold nanoarray area for each of the four different metho...
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Figure 4: Fe 2p XPS spectra corresponding to the bare Au nanoarray and 11-ferrocenyl-1-undecanethiol (FcC11) ...
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- Published 31 Oct 2014
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Scheme 1: Fabrication of the nanoperforated TiO2 layer (steps 2 and 3).
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Scheme 2: Selective functionalization of the TiO2 and gold surfaces (step 4).
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Scheme 3: Layer-by-layer PBA growth (step 5).
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Figure 1: AFM images of a) the Si substrate b) Au10, c) Au20 and d) Au50.
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Figure 2: a) AFM and b) SEM images of the sample Au10NC. Depth distribution histogram in the c) dark and d) l...
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Figure 3: SEM micrographs of a) Au20NC and b) Au50NC.
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Figure 4: AFM images of a) Au20NC, b) Au50NC and SEM micrographs of c) Au20NC and d) Au50NC.
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Figure 5: SEM image corresponding to a dark area of the sample Au20NC.
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Figure 6: SEM image corresponding to CoFe PBA grown on the nanoperforated films without prior functionalizati...
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Figure 7: XPS spectra of a film immersed in MHA solution a) before and b) after rinsing with EtOH.
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Figure 8: a) AFM image, b) height profile along the green dotted line on the AFM image and c) SEM image of NC...
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Figure 9: AFM images of a) NC02, b) NC03 and SEM micrographs of c) NC02, d) NC03.
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Figure 10: AFM images of a) NC04, b) NC05 and SEM micrographs of c) NC04, d) NC05.
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Figure 11: IR spectra of NC01 and NC04.
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- Published 11 Nov 2014
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Figure 1: TbPc2 molecule (left). Investigated layer stack: TbPc2 thin films on cobalt grown on SiO2/Si(111).
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Figure 2: Dielectric function of a TbPc2 film on cobalt. The blue lines and the red lines represent the real ...
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Figure 3: Definition of the molecular tilt angle (top). Average tilt angle of the TbPc2 molecules on cobalt (...
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Figure 4: AFM topography characteristics of TbPc2 thin films. Line scan profiles and AFM surface images for T...
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Figure 5: AFM statistical analysis of TbPc2 thin films. (a) Average grain diameter and height as a function o...
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Figure 6: cs-AFM electrical measurements. (a) Electrical setup employed for local electrical measurements via...
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Figure 7: Transport mechanism for TbPc2 thin films. Red and blue solid lines indicate the average of 20 local...
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- Published 18 Nov 2014
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Figure 1: UPS spectra acquired for the Au(111) sample exposed to increasing doses of Fe(dpm)3 with low (left)...
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Figure 2: (Top panel) UPS spectra relative to the Fe(dpm)3 saturation coverage (grey curve) and the clean sub...
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Figure 3: Projected DOS of the molecules in Fe(dpm)3@Au(111) (a), FeOH(dpm)2@Au(111) (b), and Fe(dpm)2@Au(111...
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Figure 4: C 1s, O 1s and Fe 2p XPS spectra for the Au(111) substrate exposed to increasing doses of Fe(dpm)3.
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Figure 5: STM image of Au(111) surface after exposure to Fe(dpm)3 for t1 = 30 min (LR) at T = 30 K. (a) Size ...
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Figure 6: STM images for saturation coverage of Fe(dpm)3 on Au(111) at T = 30 K. (a) t6 = 10 min (HR); size =...
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Figure 7: Optimized geometries of the three theoretical models Fe(dpm)3@Au(111) (a), FeOH(dpm)2@Au(111) (b), ...
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Figure 8: X-ray absorption spectra for a bulk sample of Fe(dpm)3 acquired using the left (σ+) and right (σ−) ...
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- Published 25 Nov 2014
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Figure 1: Chemical structures of 1-Pc and 2-Pc.
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Figure 2: C1s XPS spectral region of Si-1-Pc (a) and PSi-1-Pc (b).
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Figure 3: N 1s XPS spectral region of Si-1-Pc (a) and PSi-1-Pc (b).
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Figure 4: Co 2p3/2 XPS spectral region of Si-Co-Pc (a) and PSi-Co-Pc (b). The Co 2p3/2 region of CoCl2 powder...
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Figure 5: N 1s XPS region of Si-Co-Pc (a) and PSi-Co-Pc (b).
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Figure 6: FTIR spectral region between 3400–2800 cm−1 (CHx stretching region) of PSi-1-Pc (below) and PSi-Co-...
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- Review
- Published 25 Nov 2014
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Figure 1: Classification of core–shell SCO systems.
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Figure 2: Synthesis route and schematic representation of the luminescent, SCO, SiO2 nanoparticles. Reproduce...
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Figure 3: a) Schematic overview of the formation of the nanocomposite, gold-decorated SCO–SiO2 nanoparticles....
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Figure 4: Schematic representation of single layer Au@PBA nanoparticles, double layer Au@PBA@PBA core–shell N...
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Figure 5: HRTEM images of core–multishell PBA nanoparticles a) RbCoFe@KNiCr@RbCoFe and b) KNiCr@RbCoFe@KNiCr,...
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Figure 6: a) Architecture of the OLED device constructed by Matsuda et al. [28]. b) A schematic representation of...
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Figure 7: a) SEM image of a gold nanorod array with 200 nm pitch. b) Extinction spectra of three nanorod arra...
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Figure 8: a) Schematic view of the molecular memory proposed by Zhang et al. At low temperatures, the spin st...
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Figure 9: Thermal SCO curves for different thicknesses of an inactive HS shell, calculated with a compressibl...
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Figure 10: Comparison between the thermal SCO curves of a 9 × 9 hollow particle with a 3 × 3 hole and a 9 × 9 ...
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- Full Research Paper
- Published 26 Nov 2014
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Figure 1: Molecular structure of the complexes C1 to C4. In all cases the Pt atom is fourfold coordinated by ...
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Figure 2: Topography analysis of a monolayer of C1 (a,b) and C2 (c–f) on Au(111). C1 grows in only one close-...
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Figure 3: (a) Energy and LDOS of calculated orbitals for C1 in the gas phase. Here, a work function of 5.1 eV...
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Figure 4: dI/dV maps of C1 at 1.4 V recorded in constant current (a) and constant height (b) mode, respective...
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Figure 5: dI/dV spectra taken over the Pt atom and the pyridine group of C1 exhibit a peak at 1.9 V that we a...
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Figure 6: STM images of self-assembled monolayers of C3 (a) and C4 (b). Due to the rotational degree of freed...
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Figure 7: Series of dI/dV maps of complex C3 and corresponding calculated orbitals of gas-phase molecules.
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Figure 8: Tunneling spectra of C3 and C4 each acquired at the pyridine and triazole groups of the TL. For com...
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- Full Research Paper
- Published 27 Nov 2014
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Figure 1: Molecular structure of Dy1 (top). Dy, O, N, C, S and F atoms are depicted in light blue, red, blue,...
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Figure 2: Angular dependence of χMT measured for Dy1 in the three orthogonal planes with the best fitted curv...
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Figure 3: Representation of supramolecular interactions in Dy1. Dy, O, N, C, S and F atoms are depicted in li...
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Figure 4: Orientation of the experimental (black) and calculated ground-state anisotropy axes for Dy1 (top). ...
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- Published 19 Dec 2014
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Figure 1: Chemical structure of the cationic oligo(fluorene) (TF).
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Figure 2: XRD spectra of SME, dehydrated SME (DHS), TF-intercalated hybrids (T5, T15, and T30), and the PS/TF...
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Figure 3: The fluorescence spectra of PT5 (a), PT15 (b), PT30 (c) and TF films (d).
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Figure 4: Fluorescence microscopy image, corresponding AFM magnification X,Y = 20 µm (inset) and cluster prof...
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Figure 5: (a–c) Microscopy images of films of PT5, PT15 and PT30 cast under breath figure conditions. (d–f) F...
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Figure 6: Chromatic stability of steady-state PL spectra upon UV exposure for 0 (dark blue line) to 20 min (r...
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- Full Research Paper
- Published 29 Jan 2015
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Figure 1: Representation of the structure of the molecular linkers: terphenyl-4,4"-dicarbonitrile (1) [24,43], terph...
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Scheme 1: Synthesis of the terphenyl-4,4"-di(propiolonitrile) linker (2). Reagents and conditions: a) proparg...
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Figure 2: ORTEP plot of compound 2. Ellipsoids were drawn at a 30% level of probability for all non-hydrogen ...
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Figure 3: Comparison of the molecular self-assembled monolayers of 1 and 2 on a Ag(111) surface. a) Densely p...
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Figure 4: High-resolution STM image showing a) the molecular packing in chevron layers mediated by the propil...
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Figure 5: STM image of the lanthanide-directed assembly on Ag(111) for appreciable surface concentration (lin...
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- Review
- Published 03 Mar 2015
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Figure 1: Molecular structure and schematic representation of the “molecular clip” illustrating its specific ...
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Figure 2: “On demand” realization of dimer-, polymer- or network-like topologies from a given rigid core and ...
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Figure 3: Compound IV: (A) molecular structure and (B) self-assembly of IV demonstrated by a high-resolution ...
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Figure 4: 3D Janus tecton: schematic structure of the two-faced building block laying on the substrate (alkyl...
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Figure 5: Synthetic strategy and expected organization on C(sp2)-carbon-based supports of the self-assembled ...
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Figure 6: Self-assembly of a Janus tecton precursor (JAP) and the Janus tectons (JA). Drift-corrected STM ima...
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Figure 7: Self-assembly on graphene. Drift-corrected STM images obtained in air on a monolayer graphene subst...
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- Full Research Paper
- Published 11 Mar 2015
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Figure 1: a) I–V curve recorded for a typical electroburning (EB) process. Inset: optical image of one of the...
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Figure 2: top) Number of measured devices displaying the following behavior: A) sizeable tunneling current (I...
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Figure 3: (top) Ibreak current at which the EB process was observed in air (filled dots) and under vacuum (op...
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Figure 4: a) SEM image of epitaxial graphene devices after the EB process in air (left) and under vacuum (rig...
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Figure 5: a) SEM image of a non-patterned disc after the EB process. During EB the area around the graphene–m...
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- Published 12 Mar 2015
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Figure 1: Graphene nanoribbon MZI structure (zigzag type).
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Figure 2: Graphene nanoribbon MZI structure (armchair type).
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Figure 3: Transmittance versus change in electron energy for graphene nanoribbon MZI structure (a) zigzag typ...
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Figure 4: Device structure for light detection by coupling light between two resonant peaks. (top) zigzag str...
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Figure 5: (zigzag structure) Current density versus electron energy for light detection by coupling light bet...
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Figure 6: (armchair structure) Current density versus electron energy for light detection by coupling light b...
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Figure 7: Variation of peak photocurrent with number of blocks illuminated. (a) zigzag structure, (b) armchai...
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Figure 8: Variation of the peak photocurrent with photon energy. (a) Zigzag structure, (b) armchair structure....
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Figure 9: (a) The variation of the external quantum efficiency with photon energy. (b) Linear trend of peak p...
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Figure 10: (a) Variation of the external quantum efficiency with photon energy. (b) Linear trend of the peak p...
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Figure 11: Transmittance and current density vs electron energy for strong photon flux (zigzag structure).
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Figure 12: Transmittance and current density versus electron energy for a strong photon flux (armchair structu...
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