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Turn-on phosphorescence by metal coordination to a multivalent terpyridine ligand : a new paradigm for luminescent sensors
Some organic molecules can exhibit enhanced light emission after rigidification in a medium, in the formation of aggregates or after cristallization. A few classes of these molecules have recently been put forward in light of their potential as optical materials, organic light-emitting diodes (OLED), imaging units, fluorescent probes, chemical sensors, biosensors, and nanodots (to name a few). This approach can make use of non toxic organic molecules, which could be produced on a large (...)
Interfacial Engineering of P3HT/ZnO Hybrid Solar Cells Using Phthalocyanines : A Joint Theoretical and Experimental Investigation
G. Mattioli, S. Ben Dkhil, M. I. Saba, G. Malloci, C. Melis, P. Alippi, F. Filippone, P. Giannozzi, A. K. Thakur, M. Gaceur, O. Margeat, A. K. Diallo, C. Videlot-Ackermann, J. Ackermann, A. A. Bonapasta, A. Mattoni, Adv. Energy Mater. 2014, DOI : 10.1002/aenm.201301694 http://onlinelibrary.wiley.com/doi/...
Atomistic simulations and experimental investigations are combined to study heterojunction interfaces of hybrid polymer solar cells, with the aim to better understand and precisely (...)
See the growth of nanoalloys in solution at the atomic scale by HRTEM in a graphene liquid cell
Astrid De Clercq†‡, Walid Dachraoui†, Olivier Margeat†, Katrin Pelzer‡, Claude R. Henry† and Suzanne Giorgio†*,
J. Phys. Chem. Lett. 2014, 5, 2126-2130
†Aix Marseille Université, CNRS, CINaM UMR 7325, 13288, Marseille, France
‡Aix Marseille Université, CNRS, MADIREL UMR 7246, 13397, Marseille, France
The growth of Pt-Pd nanoalloys from organometallic precursors in solution is studied in situ in real time by high resolution transmission electron microscopy in a graphene oxide liquid cell. The (...)
Information on quantum states pervades the visible spectrum of the ubiquitous Au144(SR)60 gold nanocluster
H.-Ch. Weissker, H. Barron Escobar, V.D. Thanthirige, K. Kwak, D. Lee, G. Ramakrishna, R.L. Whetten & X. López-Lozano ; Nature Commun. 5, 3785 (2014)
Very small metal clusters have absorption spectra showing individual peaks, which reflects the discreteness of the localized electronic states. Smooth bands as known for the bulk metals develop with increasing size. Correspondingly, discrete absorption peaks in optical spectra give way to smooth spectra containing, at most, a broad localized (...)
Physical control of spatial localization of the production of gas bubbles from water electrolysis.
At a macroscopic scale, observation of the production of gas (oxygen or hydrogen) bubbles from water electrolysis shows that the phenomenon takes place everywhere on the surface of each electrode because the entire surface area of each of these electrodes is at the same voltage. This illustrates the paradigm of electrolysis where a physical parameter, i.e. the voltage difference between electrodes controls a chemical reaction. Here we show that both applying clever ac electrolysis voltages (...)
Nanometric Protein-Patch Arrays on Glass and Polydimethylsiloxane for Cell Adhesion Studieuses
F. Pi, P. Dillard, L. Limozin, A. Charrier, K. Sengupta
Nano Letters 13 7 3372-3378 (2013)
We developed a simple cost-effective bench-top protocol to functionalize substrates with nanometric protein patches with variable patch size, for cell adhesion studies. Patterned glass slides were used for advanced optical imaging of T-lymphocytes, to explore adhesion by reflection interference contrast microscopy, and the possible colocalization of T-cell receptor microclusters and the activating (...)
A field effect transistor biosensor with a γ-pyrone derivative engineered lipid-sensing layer for ultrasensitive Fe3+ ion detection with low pH interference
Field effect transistors have risen as one of the most promising techniques in the development of biomedical diagnosis and monitoring. In such devices, the sensitivity and specificity of the sensor rely on the properties of the active sensing layer (gate dielectric and probe layer). We propose here a new type of transistor developed for the detection of Fe3+ ions in which this sensing layer is made of a monolayer of lipids, engineered in such a way that it is not sensitive to pH in the (...)
Growth of Si ultrathin films on silver surfaces : Evidence of an Ag(110) reconstruction induced by Si
Romain Bernard, Thomas Leoni, Axel Wilson, Tony Lelaidier, Houda Sahaf, Eric Moyen, Loïc Assaud, Lionel Santinacci, Frédéric Leroy, Fabien Cheynis, Alain Ranguis, Haik Jamgotchian, Conrad Becker, Yves Borensztein, Margrit Hanbücken, Geoffroy Prévot, and Laurence Masson, Phys. Rev. B 88, 121411(R) (2013).
In the past five years, it has been shown that ultrathin Si films with potential intriguing properties can be grown on Ag substrates. A graphene-like signature in photoemission spectra has been (...)
Actualités
Loïc Assaud, doctorant au CINaM, reçoit le "young scientist award" de l’E-MRS 2013.
Les travaux de Loïc Assaud sur la fonctionnalisation de substrats nanostructurés pour l’énergie sont mis à l’honneur durant le Spring Meeting de l’E-MRS de Strasbourg. Il combine les techniques de structuration électrochimique des surfaces avec la fonctionnalisation par Atomic Layer Deposition (ALD). Ainsi, il a réalisé des nano-condensateurs ou des électro-catalyseurs pour les piles à combustibles. Sa recherche donc a été récompensée lors du symposium intitulé Energy Conversion Applications by Atomic (...)
Kheya Sengupta, chercheuse CNRS au CINaM, s’est vue décerner un financement du Conseil Européen de la Recherche (ERC) pour son projet SYNINTER
Le projet « SYNINTER » (Smart interrogation of the immune synapse by nano-patterned and soft 3D substrates), mené par Kheya Sengupta, vient d’être financé par le Conseil Européen de la Recherche, dans la catégorie « Starting Grants ». Ce projet cherche à comprendre la physique de l’adhésion cellulaire et plus spécifiquement de la synapse immunitaire.
The project “SYNINTER” (Smart interrogation of the immune synapse by nano-patterned and soft 3D substrates), directed by Kheya Sengupta, was recently awarded (...)
À noter
Séminaire CINaM
Prof. Ralf B. Wehrspohn, Jeudi 24 juillet 2014 à 16H00 CINaM - Salle Raymond Kern, Black (...)
