Read by QxMD icon Read


Irina Avilova, Ekaterina Khakina, Ol''ga Kraevaya, Alexander Kotelnikov, Raisa Kotelnikova, Pavel Troshin, Vitaliy Volkov
Self-diffusion of water-soluble fullerene derivative (WSFD) C60 [S(CH2 )3 SO3 Na]5 H in mouse red blood cells (RBC) was characterized by 1 H pulsed field gradient NMR technique. It was found that a fraction of fullerene molecules (~13% of the fullerene derivative added in aqueous RBC suspension) shows a self-diffusion coefficient of (5.5 ± 0.8)·10-12  m2 /s, which is matching the coefficient of the lateral diffusion of lipids in the erythrocyte membrane (DL  = (5.4 ± 0.8)·10-12  m2 /s). This experimental finding evidences the absorption of the fullerene derivative by RBC...
May 21, 2018: Biochimica et Biophysica Acta
Matteo Di Giosia, Paul H H Bomans, Andrea Bottoni, Andrea Cantelli, Giuseppe Falini, Paola Franchi, Giuseppe Guarracino, Heiner Friedrich, Marco Lucarini, Francesco Paolucci, Stefania Rapino, Nico A J M Sommerdijk, Alice Soldà, Francesco Valle, Francesco Zerbetto, Matteo Calvaresi
Hybrid systems have great potential for a wide range of applications in chemistry, physics and materials science. Conjugation of a biosystem to a molecular material can tune the properties of the components or give rise to new properties. As a workhorse, here we take a C60@lysozyme hybrid. We show that lysozyme recognizes and disperses fullerene in water. AFM, cryo-TEM and high resolution X-ray powder diffraction show that the C60 dispersion is monomolecular. The adduct is biocompatible, stable in physiological and technologically-relevant environments, and easy to store...
May 23, 2018: Nanoscale
Alicja Domaracka, Rudy Delaunay, Arkadiusz Mika, Michael Gatchell, Henning Zettergren, Henrik Cederquist, Patrick Rousseau, Bernd A Huber
Ionization, fragmentation and molecular growth have been studied in collisions of 22.5 keV He2+- or 3 keV Ar+-projectiles with pure loosely bound clusters of coronene (C24H12) molecules or with loosely bound mixed C60-C24H12 clusters by using mass spectrometry. The heavier and slower Ar+ projectiles induce prompt knockout-fragmentation - C- and/or H-losses - from individual molecules and highly efficient secondary molecular growth reactions before the clusters disintegrate on picosecond timescales. The lighter and faster He2+ projectiles have a higher charge and the main reactions are then ionization by ions that are not penetrating the clusters...
May 23, 2018: Physical Chemistry Chemical Physics: PCCP
Daria Smazna, Joana Rodrigues, Sindu Shree, Vasile Postica, Gero Neubüser, A F Martins, N Ben Sedrine, Naresh K Jena, Leonard Siebert, Fabian Schütt, Oleg Lupan, Rajeev Ahuja, M R Correia, Teresa Monteiro, Lorenz Kienle, Ya Yang, Rainer Adelung, Yogendra Kumar Mishra
Buckminster fullerene (C60) based hybrid metal oxide materials are receiving considerable attention because of their excellent fundamental and applied aspects, like semiconducting, electron transfer, luminescent behaviors, etc. and this work briefly discusses the successful fabrication of C60 decorated ZnO tetrapod materials and their detailed structure-property relationships including device sensing applications. The electron microscopy investigations indicate that a quite dense surface coverage of ZnO tetrapods with C60 clusters is achieved...
May 21, 2018: Nanoscale
Jacek Grebowski, Paulina Kazmierska, Grzegorz Litwinienko, Anna Lankoff, Marian Wolszczak, Anita Krokosz
Fullerenols (polyhydroxylated fullerene C60 ) are nanomaterial with potentially broad applicability in biomedical sciences with high antioxidant ability, thus, we investigated the radioprotecting potential of fullerenol C60 (OH)36 on human erythrocytes irradiated by high-energy electrons of 6 MeV. The results demonstrate that C60 (OH)36 at concentration of 150 μg/mL protects the erythrocytes against the radiation-induced hemolysis (comparing to non-protected cells, we observed 30% and 39% protection for 0...
May 17, 2018: Biochimica et Biophysica Acta
Seiichiro Izawa, Naoto Shintaku, Masahiro Hiramoto
Open-circuit voltage ( VOC ) is a key parameter governing the power conversion efficiency of organic solar cells. We clarified the effect of band bending in organic semiconductor films on the VOC of phthalocyanine (H2 Pc)/fullerene (C60 ) planar heterojunction (PHJ) OSCs. The VOC was significantly affected by the H2 Pc layer thickness, varying from 0.20 V at 2 nm to 0.49 V at 100 nm thickness. The large VOC change is due to the band bending in the H2 Pc layer, where the difference in H2 Pc layer thickness led to significant changes in the degree of the vacuum-level shift in the C60 layer because of the Fermi level ( EF ) difference between the H2 Pc and C60 layers...
May 18, 2018: Journal of Physical Chemistry Letters
Bahman Kheradmand-Boroujeni, Markus P Klinger, Axel Fischer, Hans Kleemann, Karl Leo, Frank Ellinger
Organic/polymer transistors can enable the fabrication of large-area flexible circuits. However, these devices are inherently temperature sensitive due to the strong temperature dependence of charge carrier mobility, suffer from low thermal conductivity of plastic substrates, and are slow due to the low mobility and long channel length (L). Here we report a new, advanced characterization circuit that within around ten microseconds simultaneously applies an accurate large-signal pulse bias and a small-signal sinusoidal excitation to the transistor and measures many high-frequency parameters...
May 16, 2018: Scientific Reports
Tokushi Kizuka, Kou Watanabe, Daisuke Matsuura, Toshio Konno, Shuichi Shimomura, Takatsugu Wakahara, Kun'ichi Miyazawa
Crystalline nanowhiskers (NWs) composed of fullerene C60 and C70 molecules, i.e., alloy NWs, were synthesized by a liquid-liquid interfacial precipitation method. The nominal composition of C70 ranged from 0 to 40 mass%. The bending tests of the alloy NWs were performed inside a high-resolution transmission electron microscope, and the deformation behavior was observed in situ. The bending force acting on the NWs were measured simultaneously by an optical deflection method, and the Young's modulus was estimated from the resulting force-flexure curves...
January 1, 2018: Journal of Nanoscience and Nanotechnology
Taisuke Matsuno, Yusuke Nakai, Sota Sato, Yutaka Maniwa, Hiroyuki Isobe
Dynamics of molecules in the solid state holds promise for connecting molecular behaviors with properties of bulk materials. Solid-state dynamics of [60]fullerene (C60 ) is controlled by intimate intermolecular contacts and results in restricted motions of a ratchet phase at low temperatures. Manipulation of the solid-state dynamics of fullerene molecules is thus an interesting yet challenging problem. Here we show that a tubular host for C60 liberates the solid-state dynamics of the guest from the motional restrictions...
May 15, 2018: Nature Communications
Xiao-Yu Yang, Hao-Sheng Lin, Il Jeon, Yutaka Matsuo
Aryl[60]fullerenyl cations (ArC60 + ), which were generated by heating aryl[60]fullerenyl dimers (ArC60 -C60 Ar) to generate aryl[60]fullerenyl radicals (ArC60 • ) followed by oxidation using Cu(II) salts (Cu(BF4 )2 (aq)), were reacted with various functionalized aryl boronic acids to produce functionalized 1,4-diaryl[60]fullerenes. This protocol tolerated various functional groups, such as OH, NH2 , COCH3 , and Cl substituents, with yields reaching 93%. C60 Ar1 Ar2 (Ar2 = p-NH2 C6 H4 ) was used as a dopant in a photoactive CH3 NH3 PbI3 layer of a perovskite solar cell...
May 15, 2018: Organic Letters
Ye Liu, Akash Kannegulla, Bo Wu, Li-Jing Cheng
Spherical fullerene (C60 ) can quench the fluorescence of a quantum dot (QD) through energy transfer and charge transfer processes, with the quenching efficiency regulated by the number of proximate C60 on each QD. With the quenching property and its small size compared with other nanoparticle-based quenchers, it is advantageous to group a QD reporter and multiple C60 -labeled oligonucleotide probes to construct a molecular beacon (MB) probe for sensitive, robust nucleic acid detection. We demonstrated a rapid, high-sensitivity DNA detection method using the nanosensors composed of QD-C60 based MBs carried by magnetic nanoparticles (MNPs)...
May 15, 2018: ACS Applied Materials & Interfaces
Kevin R Hinkle, Frederick R Phelan
Molecular dynamics simulations were used to examine the solvation behavior of buckminsterfullerene and single-walled carbon nanotubes (SWCNT) in a range of water/alcohol solvent compositions at 1 atm and 300 K. Results indicate that the alcohols assume the role of pseudosurfactants by shielding the nanotube from the more unfavorable interactions with polar water molecules. This is evident in both the free energies of transfer (ΔΔ G water→ x OH = -68.1 kJ/mol and -86.5 kJ/mol for C60 in methanol and ethanol; ΔΔ G water→ x OH = -345...
October 19, 2017: Journal of Physical Chemistry. C, Nanomaterials and Interfaces
Eleni Nestoros, Mihaiela C Stuparu
Unlike typical polycyclic aromatic hydrocarbons, such as coronene, which are flat and planar, corannulene is a molecular bowl of carbon. It can be imagined as the cap region of fullerene C60 or an end of a single-walled carbon nanotube. This structural distinction manifests itself in unique properties. For example, corannulene exhibits bowl-flipping dynamics, electron accepting capability, and formation of a ball-in-socket type of interaction with C60. These varied properties allow for application of corannulene in a myriad of disciplines ranging from organic electronics and sensing to energy storage and self-assembly...
May 14, 2018: Chemical Communications: Chem Comm
Erica Ciotta, Paolo Prosposito, Pietro Tagliatesta, Chiara Lorecchio, Lorenzo Stella, Saulius Kaciulis, Peiman Soltani, Ernesto Placidi, Roberto Pizzoferrato
A novel type of graphene-like nanoparticle, synthesized by oxidation and unfolding of C60 buckminsterfullerene fullerene, showed multiple and reproducible sensitivity to Cu2+ , Pb2+ , Cd2+ , and As(III) through different degrees of fluorescence quenching or, in the case of Cd2+ , through a remarkable fluorescence enhancement. Most importantly, only for Cu2+ and Pb2+ , the fluorescence intensity variations came with distinct modifications of the optical absorption spectrum. Time-resolved fluorescence study confirmed that the common origin of these diverse behaviors lies in complexation of the metal ions by fullerene-derived carbon layers, even though further studies are required for a complete explanation of the involved processes...
May 10, 2018: Sensors
Kuo Yuan Chiu, Sheng Hsiung Chang, Wei-Chen Huang, Hsin-Ming Cheng, Hsin Shaw, Shih-Chieh Yeh, Chin-Ti Chen, Yuhlong Oliver Su, Sheng-Hui Chen, Chun-Guey Wu
A graded fullerene derivative thin film was used as a dual-functional electron transport layer (ETL) in CH3NH3PbI3 (MAPbI3) solar cells, to improve the fill factor and device stability. The graded ETL was made by mixing phenyl-C61-butyric acid methyl ester (PCBM) molecules and C60-diphenylmethanofullerene-oligoether (C60-DPM-OE) molecules using the spin-coating method. The formation of the graded ETLs can be due to the phase separation between hydrophobic PCBM and hydrophilic C60-DPM-OE, which was confirmed by XPS depth-profile analysis and an electron energy-loss spectroscope...
May 4, 2018: Nanotechnology
Marcelo Goulart, Martin Kuhn, Paul Martini, Lei Chen, Frank Hagelberg, Alexander Kaiser, Paul Scheier, Andrew Michael Ellis
Ionic complexes between gold and C60 have been observed for the first time. Cations and anions of the type [Au(C60)2]+/- are shown to have particular stability. Calculations suggest that these ions adopt a C60-Au-C60 sandwich-like (dumbbell) structure which is reminiscent of [XAuX]+/- ions previously observed for much smaller ligands. The [Au(C60)2]+/- ions can be regarded as Au(I) complexes, regardless of whether the net charge is positive or negative, but in both cases the charge transfer between the Au and C60 is incomplete, most likely because of a covalent contribution to the Au-C60 binding...
May 3, 2018: Journal of Physical Chemistry Letters
F Khodabakhshi, M Nosko, A P Gerlich
Multipass friction-stir processing was employed to uniformly disperse multiwalled carbon nanotubes (MW-CNTs) within an Al-Mg alloy metal matrix. Decomposition of MW-CNTs occurs in situ as a result of solid-state chemical reactions, forming fullerene (C60) and aluminium carbide (Al4 C3 ) phases during reactive high temperature severe plastic processing. The effects of this decomposition on the microstructural features, dynamic restoration mechanisms and crystallographic microtextural developments are studied for the first time by using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) analysis...
May 3, 2018: Journal of Microscopy
Yuki Asai, Yukiko Sakakibara, Rina Inoue, Rikako Inoue, Masayuki Nadai, Miki Katoh
Single-walled carbon nanotubes (SWCNTs) are made from a rolled single sheet of graphene with a diameter in the nanometer range. SWCNTs are potential carriers for drug delivery systems because antibodies or drugs can be loaded on their surface; however, their effect on the activities of cytochrome P450 (CYP) remains unclear. The aim of this study was to investigate the effect of two kinds of SWCNTs with different lengths (FH-P- and SO-SWCNTs) on human CYP activity. In addition, other nano-sized carbon materials, such as carbon black, fullerene-C60 , and fullerene-C70 were also evaluated to compare their effects on CYP activities...
May 2, 2018: Biopharmaceutics & Drug Disposition
Xiujuan Han, Zuchao Meng, Hongfang Zhang, Jianbin Zheng
Various carbon nanomaterials for use in anodic stripping voltammetric analysis of Hg(II), Cu(II), Pb(II) and Cd(II) are screened. Graphene, carbon nanotubes, carbon nanofibers and fullerene (C60 ), dispersed in chitosan (Chit) aqueous solution, are used to modify a glassy carbon electrode (GCE). The fullerene-chitosan modified GCE (C60 -Chit/GCE) displays superior performance in terms of simultaneous determination of the above ions. The electrodes and materials are characterized by electrochemical impedance spectroscopy, cyclic voltammetry, scanning electron microscopy, Raman spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy...
May 1, 2018: Mikrochimica Acta
Hironori Tsunoyama, Masahiro Shibuta, Masato Nakaya, Toyoaki Eguchi, Atsushi Nakajima
Nanoclusters, aggregates of several to hundreds of atoms, have been one of the central issues of nanomaterials sciences owing to their unique structures and properties, which could be found neither in nanoparticles with several nanometer diameters nor in organometallic complexes. Along with the chemical nature of each element, properties of nanoclusters change dramatically with size parameters, making nanoclusters strong potential candidates for future tailor-made materials; these nanoclusters are expected to have attractive properties such as redox activity, catalysis, and magnetism...
May 1, 2018: Accounts of Chemical Research
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"