Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Lab-on-a-chip (LOC) applications in environmental, biomedical, agricultural, biological, and spaceflight research require an ion-selective electrode (ISE) ...

Pennsylvania State University Hazleton

We report the structural and electrical characterization of thin films of organic semiconductor molecules consisting of an oligothiophene core capped with electron-withdrawing tricyanovinyl (TCV) groups. X-ray diffraction and atomic force microscopy of evaporated films of three different TCV-capped oligothiophenes showed that the films were highly crystalline. Electrical transport was measured in thin film transistors employing silver source and drain contacts and channel probes to correct for contact resistance. Three compounds exhibited n-channel (electron) conduction consistent with cyclic voltametry data that indicated they undergo facile reduction. Maximum electron mobilities were 0.02 cm2/V.s with an on/off current ratio of 10(6). A fourth end-capped molecule, TCV-6T-TCV, which had six thiophene rings, exhibited both p- and n-channel transport. Overall, these results confirm that substitution of oligothiophene cores with electron-withdrawing groups is a useful strategy to achieve electron-transporting materials.

N- and P-channel transport behavior in thin film transistors based on tricyanovinyl-capped oligothiophenes.

Les auteurs rapportent la caract&eacute;risation structurale et &eacute;lectrique des couches minces de mol&eacute;cules de semi-conducteur organique compos&eacute; d&#39;un noyau d&#39;oligothioph&egrave;nes coiff&eacute; de groupes tricyanovinyle (TCV) &eacute;lectroattracteurs. Diffraction des rayons x et microscopie &agrave; force atomique de films &eacute;vapor&eacute;s de trois diff&eacute;rents thiol TCV Diablotin a montr&eacute; que les films &eacute;taient hautement cristallins. Canal sondes pour corriger la r&eacute;sistance de contact et de transport &eacute;lectrique a &eacute;t&eacute; mesur&eacute;e dans les transistors &agrave; couches minces employant des contacts en argent source et de drain. Trois compos&eacute;s expos&eacute; conduction n-channel (&eacute;lectrons) compatible avec les donn&eacute;es eu cycliques qui ont indiqu&eacute; qu&#39;ils subissent une r&eacute;duction facile. Les mobilit&eacute;s &eacute;lectroniques maximale ont &eacute;t&eacute; 0,02 cm2/V.s avec un ratio de courant on/off de 10 (6). Une quatri&egrave;me mol&eacute;cule Fin Diablotin, TCV-6 t-TCV, qui comptait six anneaux de thioph&egrave;ne, expos&eacute; les deux transports de p et n canaux. Dans l&#39;ensemble, ces r&eacute;sultats confirment que la substitution des oligothioph&egrave;nes carottes avec groupes &eacute;lectroattracteurs est une strat&eacute;gie utile pour obtenir des mat&eacute;riaux de transport d&#39;&eacute;lectrons.

Canal N et P transport de comportement dans les transistors &agrave; film mince fond&eacute; thiol diablotin tricyanovinyle.

Riportiamo la caratterizzazione strutturale ed elettrica di pellicole sottili di molecole di semiconduttore organico costituito da un nucleo oligothiophene sormontato da elettrone-ritirarsi gruppi tricyanovinyl (TCV). Diffrazione dei raggi x e microscopia a forza atomica di film evaporato di tre differenti TCV-capped oligothiophenes ha mostrato che i film sono stati altamente cristallini. Trasporto elettrico &egrave; stato misurato nei transistor a film sottile che impiegano argento contatti fonte e scolo e canale sonde per correggere la resistenza di contatto. Tre composti esposto conduzione n-channel (elettrone) coerenti con dati voltametry ciclico che indicava che subiscono riduzione facile. Mobilit&agrave; di elettrone massimo erano cm2/V.s 0,02 con un rapporto on/off corrente di 10. Una molecola con tappo finale quarta, TCV-6T-TCV, che aveva sei anelli di tiofene, esposto sia trasporto p e n-channel. Nel complesso, questi risultati confermano che la sostituzione dei nuclei oligothiophene con gruppi elettrone-ritirarsi &egrave; una strategia utile per realizzare materiali di trasporto degli elettroni.

N - e P-canale di trasporto comportamento nei transistor a film sottile basato su tricyanovinyl-capped oligothiophenes.

Divulgamos la caracterizaci&oacute;n estructural y el&eacute;ctrica de pel&iacute;culas delgadas de mol&eacute;culas de semiconductor org&aacute;nico consistente en un n&uacute;cleo de oligothiophene con grupos de tricyanovinyl (TCV) retirada de electrones. Difracci&oacute;n de rayos x y microscop&iacute;a de fuerza at&oacute;mica de evaporada pel&iacute;culas de tres oligothiophenes diferentes TCV-capped demostradas que las pel&iacute;culas eran altamente cristalinas. Transporte el&eacute;ctrico se midi&oacute; en transistores de pel&iacute;cula delgada con contactos de plata fuente y dren y sondas de canal para corregir para resistencia de contacto. Tres compuestos exhiben conducci&oacute;n de canal n (electr&oacute;n) compatible con datos voltametry c&iacute;clico que sufren reducci&oacute;n f&aacute;cil. Movilidad de electrones m&aacute;xima fueron 0.02 cm2/V.s con un ratio de corriente on/off de 10 (6). Una mol&eacute;cula de tope final cuarta, TCV-6T-TCV, que ten&iacute;a seis anillos de tiofeno, exhibieron ambos transporte de canal n y p. En general, estos resultados confirman que la substituci&oacute;n de oligothiophene corazones con grupos electr&oacute;n-retirar es una estrategia &uacute;til para conseguir materiales de transporte de electrones.

Canal N y P transporte comportamiento en transistores de pel&iacute;cula delgada basada en tope de tricyanovinyl oligothiophenes.

In the crystal structure of the title compound, C(12)H(6)Br(2)S(3), the mol-ecules are planar (r.m.s. deviation = 0.06â€…Ã…). Consecutive mol-ecules do not stack in a planar fashion. There is an angle of 81.7â€…(12)Â° between the planes of the closest mol-ecules.

2,5-Bis(5-bromo-2-thien-yl)thio-phene.

Dans la structure cristalline du compos&eacute;, titre C(12)H(6)Br(2)S(3), les mol-ecules sont planes (d&eacute;viation de r.m.s. = 0,06 &Aring;). Mol-ecules cons&eacute;cutives ne pas empiler de fa&ccedil;on plane. Il y a un angle de 81,7 (12) &deg; entre les plans de la mol-ecules plus proche de vous.

2, 5-Bis(5-bromo-2-thien-yl) thio-phene.

Nella struttura di cristallo del titolo composto, C(12)H(6)Br(2)S(3), mol-ecules sono planari (deviazione r.m.s. = 0,06 &Aring;). Mol-ecules consecutivi non impilare in modo planare. C&#39;&egrave; un angolo di (12) 81.7 &deg; tra i piani del mol-ecules pi&ugrave; vicino.

2,5-Bis(5-bromo-2-thien-yl) thio-phene.

En la estructura cristalina del t&iacute;tulo compuesto, C(12)H(6)Br(2)S(3), los ecules mol son planos (desviaci&oacute;n r.m.s. = 0,06 &Aring;). Consecutivos mol-ecules no apilar de manera plana. Hay un &aacute;ngulo de 81.7 (12) &deg; entre los planos de los mol-ecules m&aacute;s cercano.

Bis(5-bromo-2-thien-yl) 2,5 thio-phene.

El t&iacute;tulo compuesto, C(18)H(16)N(2), se cristaliza con un a&ntilde;o y medio independiente mol-ecules en la unidad asim&eacute;trica, con la mitad-mol-ecule completando por simetr&iacute;a cristalogr&aacute;fica de la inversi&oacute;n. Ambos independientes mol-ecules son casi planos, con los &aacute;tomos de H no exponer las desviaciones r.m.s. desde el plano mol ecular de m&iacute;nimos cuadrados de 0.175 y 0.118 &Aring;, respectivamente.

(1E,3E,5E,7E)-4,4&#39;-(Octa-1,3,5,7-tetra-ene-1,8-di-yl)dipyridine.

The title compound, C(18)H(16)N(2), crystallizes with one and a half independent mol-ecules in the asymmetric unit, with the half-mol-ecule being completed by crystallographic inversion symmetry. Both independent mol-ecules are almost planar, with the non-H atoms exhibiting r.m.s. deviations from the least-squares mol-ecular plane of 0.175 and 0.118â€…Ã…, respectively.

(1E,3E,5E,7E)-4,4'-(Octa-1,3,5,7-tetra-ene-1,8-di-yl)dipyridine.

Le compos&eacute; du titre, C(18)H(16)N(2), cristallise avec un an et demi ind&eacute;pendant mol-ecules dans l&#39;unit&eacute; asym&eacute;trique, avec la moiti&eacute;-mol-ecule effectu&eacute;e par sym&eacute;trie d&#39;inversion cristallographique. Les deux mol-ecules ind&eacute;pendants sont presque planes, avec les atomes de H non exposantes r.m.s. d&eacute;viations au plan mol-ecular carr&eacute;s de 0,175 et 0,118 &Aring;, respectivement.

Il titolo composto, C(18)H(16)N(2), cristallizza con uno e una met&agrave; indipendente mol-ecules nell&#39;unit&agrave; asimmetrica, con la met&agrave;-mol-ecule essere completato dalla simmetria di inversione cristallografico. Entrambi indipendenti mol-ecules sono quasi planare, con gli atomi di H non esporre le deviazioni r.m.s. dal piano di mol-ecular minimi quadrati di 0,175 e 0.118 &Aring;, rispettivamente.

The two independent mol-ecules in the asymmetric unit of the title compound, C(16)H(14)N(2), are planar [dihedral angle between the terminal pyridine rings = 1.76â€…(2)Â°] and each display an all-trans configuration of C=C double bonds. One of the two mol-ecules lies about a center of inversion. The dihedral angle between the two pyridine rings in the mol-ecule lying on a general position is 1.65â€…(2)Â°.

4-[(1E,3E,5E)-6-(4-Pyrid-yl)hexa-1,3,5-trien-yl]pyridine.

Les deux mol-ecules ind&eacute;pendants de l&#39;unit&eacute; asym&eacute;trique du titre compos&eacute;, C(16)H(14)N(2), sont planes [angle di&egrave;dre entre les anneaux de pyridine terminal = 1,76 (2) &deg;] et chacun affiche une configuration tout-trans de C = C doubles liaisons. Un des mol-deux ecules mensonges sur un centre d&#39;inversion. L&#39;angle di&egrave;dre entre les anneaux de deux pyridine dans la mol-ecule couch&eacute; sur une position g&eacute;n&eacute;rale est de 1,65 (2) &deg;.

4-[(1E,3e,5e)-6-(4-PYRID-yl)hexa-1,3,5-trien-yl]pyridine.

I due indipendenti mol-ecules nell&#39;unit&agrave; asimmetrica del titolo composto, C(16)H(14)N(2), sono planari [angolo diedro tra gli anelli terminali piridina = 1,76 (2) &deg;] e ognuno visualizzare una configurazione all-trans di doppi legami C = C. Uno dei due mol-ecules si trova su un centro di inversione. L&#39;angolo diedro tra gli anelli due piridina in mol-ecule sdraiato su una posizione generale &egrave; 1.65 (2) &deg;.

4-[(1E,3e,5e)-6-(4-Pyrid-yl)Hexa-1,3,5-trien-yl]pyridine.

Las independientes dos mol-ecules en la unidad asim&eacute;trica del t&iacute;tulo compuesto, C(16)H(14)N(2), son planos [&Aacute;ngulo diedro entre los anillos de piridina terminal = 1.76 (2) &deg;] y cada uno muestra una configuraci&oacute;n de todo transporte de C = C doble enlaces. Uno de los dos mol-ecules se encuentra sobre un centro de inversi&oacute;n. El &Aacute;ngulo diedro entre los anillos de dos piridina en el mol-ecule acostado en una posici&oacute;n general es 1,65 (2) &deg;.

Mamoun M. Bader

Department of Chemistry

Pennsylvania State University Hazleton

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Mamoun M. Bader

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Department of Chemistry

Pennsylvania State University Hazleton

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Department of Chemistry