We report a new nonwrapping approach to noncovalent engineering of carbon nanotube surfaces by short, rigid functional conjugated polymers, poly(aryleneethynylene)s. Our technique not only enables the dissolution various types nanotubes in organic solvents, which represents first example solubilization via π-stacking without polymer wrapping, but could also introduce numerous neutral and ionic groups onto surfaces.

The chiral-induced spin selectivity (CISS) effect was recently established experimentally and theoretically. Here, we review some of the new findings discuss applications that can result from special properties this effect, like reduction elastic backscattering in electron transfer through chiral molecules. CISS opens possibility using molecules spintronics for providing a deeper understanding spin-selective processes biology.

Recent experiments have demonstrated that the electron transmission yield through chiral molecules depends on spin orientation. This phenomenon has been termed chiral-induced selectivity (CISS) effect, and it provides a challenge to theory promise for organic molecule-based spintronic devices. article reviews recent developments in our understanding of CISS. Different theoretical models used describe effect; however, they all presume an unusually large spin-orbit coupling effect display...

Electron transmission experiments demonstrate a large asymmetry in the scattering probability of polarized electrons by thin organized films chiral molecules. This results from interaction electron's wavefunction with many scatterers (molecules) monolayer structure and represents manifestation quantum interference on scale supramolecular lengths.

We report on the observation of chirality induced spin selectivity for electrons transmitted through monolayers oligopeptides, both energies above vacuum level as well bound and conducted a single molecule. The dependence molecular length is measured in an electrochemical cell photoemission spectrometer photoelectrons. absolute polarization are similar energy regimes. Single molecule conductance studies provide effective charge transport barrier between two channels it found to be order 0.5 eV.

This Perspective discusses recent experiments that bear on the chiral induced spin selectivity (CISS) mechanism and its manifestation in electronic magnetic properties of molecules materials. Although discussion emphasizes newer experiments, such as magnetization dependence molecule interactions with ferromagnetic surfaces, early which reveal nonlinear scaling filtering applied potential, are described also. In many theoretical studies, one has had to invoke unusually large spin-orbit...

Noncovalent interactions between molecules are key for many biological processes. Necessarily, when interact, the electronic charge in each of them is redistributed. Here, we show experimentally that, chiral molecules, redistribution accompanied by spin polarization. We describe how this polarization adds an enantioselective term to forces, so that homochiral interaction energies differ from heterochiral ones. The was measured using a modified Hall effect device. An electric field applied...

ConspectusThe electron's spin, its intrinsic angular momentum, is a quantum property that plays critical role in determining the electronic structure of molecules. Despite importance, it not used often for controlling chemical processes, photochemistry excluded. The reason many organic molecules have total spin zero, namely, all electrons are paired. Even with high multiplicity, orientation usually only weakly coupled to molecular frame nuclei and hence orientation. Therefore, does provide...

We overview experiments performed on the chiral induced spin selectivity (CISS) effect using various materials and experimental configurations. Through this survey of different material systems that manifest CISS effect, we identify several attributes are common to all systems. Among these ability observe for two point contact configurations, when one electrodes is magnetic, correlation between optical activity a material’s filtering properties. In addition, recent show does not require pure...

Abstract Continual progress in technologies that rely on water splitting are often hampered by the slow kinetics associated with oxygen evolution reaction (OER). Here, we show efficiency of top-performing catalysts can be improved, beyond typical thermodynamic considerations, through control over intermediate spin alignment during electrolysis. Spin is achieved using chiral induced selectivity (CISS) effect and improvement OER manifests as an increase Faradaic efficiency, decrease...

We present new data on the ground state isomerization rate of DODCI and compare our results to previously obtained excited data. find that one-dimensional Kramers expression does not fit over whole viscosity range when friction is measured by either overall rotation time or solvent viscosity. The deviation qualitatively similar observed in diphenyl butadiene was used as measure. Deviations from simple hydrodynamic theory appear depend reduced frequency for isomerization. show how are...

Upon interaction with anionic phospholipids, particularly mitochondria-specific cardiolipin (CL), cytochrome c (cyt c) loses its tertiary structure and peroxidase activity dramatically increases. CL-induced of cyt has been found to be important for selective CL oxidation in cells undergoing programmed death. During apoptosis, the fraction CL-bound markedly increase, suggesting that may act as a switch regulate c's mitochondrial functions. Using cyclic voltammetry equilibrium redox...

The infrared photoresponse in the electrical conductivity of single-walled carbon nanotubes (SWNTs) is dramatically enhanced by embedding SWNTs an electrically and thermally insulating polymer matrix. change a 5 wt % SWNT−polycarbonate nanocomposite significant (4.26%) sharp upon illumination air at room temperature. While thermal effect predominates pure SWNT film, photoeffect nanocomposites.

Molecular spintronics (spin + electronics), which aims to exploit both the spin degree of freedom and electron charge in molecular devices, has recently received massive attention. Our recent experiments on employ chiral molecules have unexpected property acting as filters, by way an effect we call "chiral-induced selectivity" (CISS). In this Account, discuss new types spin-dependent electrochemistry measurements their use probe transport properties nonmagnetic conductive polymers...

This work demonstrates that chiral imprinted CdSe quantum dots (QDs) can act as spin selective filters for charge transport. The filtering properties of nanoparticles were investigated by magnetic conductive-probe atomic force microscopy (mCP-AFM) measurements and magnetoresistance measurements. mCP-AFM show the chirality orientation tip affect current-voltage curves. Similarly, demonstrate electrical transport through films correlates with chiroptical QD. may prove useful in future...

This work demonstrates the chiral-induced spin selectivity effect for inorganic copper oxide films and exploits it to enhance chemical in electrocatalytic water splitting. Chiral CuO are electrodeposited on a polycrystalline Au substrate, their filtering electrons is demonstrated using Mott polarimetry analysis of photoelectrons. known act as an electrocatalyst oxygen evolution reaction; however, also generates side products such H2O2. We show that chiral selective O2; H2O2 generation...

Electron spin and molecular chirality are emerging as factors that can be used effectively to direct charge flow at the scale. We report order of magnitude effects on electron-transfer rates between quantum dots (QDs) in chiral QD assemblies. Indeed, both circular polarization light excites electron donor imprinted acceptor QDs affect dot-to-dot kinetics. define a for rate constant show it correlates with strength dichroism (CD) spectrum. These findings imply CD exciton transition(s) may...

The direct synthesis of chiroptical organic-inorganic methylammonium lead bromide perovskite nanoplatelets that are passivated by R- or S-phenylethylammonium ligands is reported. circular dichroism spectra can be divided into two components: (1) a region associated with charge transfer transition between the ligand and nanoplatelet, 300-350 nm, (2) corresponding to excitonic absorption maximum perovskite, 400-450 nm. temperature- concentration-dependent indicate chiro-optical response arises...