Temperature and orientation study of cobalt phthalocyanine CoPc thin films deposited on silicon substrate as studied by micro-Raman scattering spectroscopy

Szybowicz, Mirosław; Bała, W.; Dümecke, S.; Fabisiak, K.; Paprocki, K.; Drozdowski, M.

doi:10.1016/j.tsf.2011.07.051

Cited by 20 publications

(20 citation statements)

References 20 publications

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“…The band at ≈521.3 cm −1 is assigned to Co(OH) 2 species and is due to ν(Co-O) (A g ) symmetric stretching mode, while that at ≈548.1 cm −1 is due to ν(Co-N) stretching mode. [39][40][41] Upon application of an oxidizing potential, the bands at 465.4 cm −1 and at 548.1 cm −1 diminish in intensity while the one at 523 cm −1 is accentuated. Meanwhile, the band at 778.5 cm −1 , ascribed to deformation of the complex, also decreases in intensity with increase of the applied potential.…”

Section: D Metal-organic Frameworkmentioning

confidence: 99%

Ultrathin 2D Cobalt Zeolite‐Imidazole Framework Nanosheets for Electrocatalytic Oxygen Evolution

et al. 2018

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Abstract2D layered materials, including metal‐di‐chalcogenides and transition metal layered double hydroxides, among others, are intensively studied because of new properties that emerge from their 2D confinement, which are attractive for advanced applications. Herein, 2D cobalt ion (Co2+) and benzimidazole (bIm) based zeolite‐imidazole framework nanosheets, ZIF‐9(III), are reported as exceptionally efficient electrocatalysts for the oxygen evolution reaction (OER). Specifically, liquid‐phase ultrasonication is applied to exfoliate a [Co4(bIm)16] zeolite‐imidazole framework (ZIF), named as ZIF‐9(III) phase, into nanoscale sheets. ZIF‐9(III) is selectively prepared through simple mechanical grinding of cobalt nitrate and benzimidazole in the presence of a small amount of ethanol. The resultant exfoliated nanosheets exhibit significantly higher OER activity in alkaline conditions than the corresponding bulk phases ZIF‐9 and ZIF‐9(III). The electrochemical and physicochemical characterization data support the assignment of the OER activity of the exfoliated nanosheet derived material to nitrogen coordinated cobalt oxyhydroxide N4CoOOH sites, following a mechanism known for Co‐porphyrin and related systems. Thus, exfoliated 2D nanosheets hold promise as potential alternatives to commercial noble metal electrocatalysts for the OER.

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Section: D Metal-organic Frameworkmentioning

confidence: 99%

Ultrathin 2D Cobalt Zeolite‐Imidazole Framework Nanosheets for Electrocatalytic Oxygen Evolution

et al. 2018

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“…[8] Micro Raman scattering spectroscopy has been utilized to study the polymorphism of CoPc and FePc on silicon at different growth temperatures. [9] CoPc and FePc thin films show phase transition from α polymorph to β polymorph above 200°C, and polarized Raman spectroscopy efficiently distinguishes the two phases. However, a comprehensive study for the room temperature deposition of FePc and CoPc on technologically relevant substrates is lacking.…”

Section: Introductionmentioning

confidence: 99%

Influence of substrate on molecular order for self‐assembled adlayers of CoPc and FePc

Kumar

Naumenko

Cozzarini

et al. 2018

J Raman Spectroscopy

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Self‐assembled metal phthalocyanine thin films are receiving considerable interest due to their potential technological applications. In this study, we present a comprehensive study of CoPc and FePc thin films of about 50 nm thickness on technologically relevant substrates such as SiOx/Si, indium tin oxide (ITO) and polycrystalline gold in order to investigate the substrate induced effects on molecular stacking and crystal structure. Raman spectroscopic analysis reveals lower intensity for the vibrational bands corresponding to phthalocyanine macrocycle for the CoPc and FePc thin films grown on ITO as compared to SiOx/Si due to the higher order of phthalocyanine molecules on SiOx/Si. Atomic force microscopy analysis displays higher grain size for FePc and CoPc thin films on ITO as compared to SiOx/Si and polycrystalline gold indicating towards the influence of molecule–substrate interactions on the molecular stacking. Grazing incidence X‐ray diffraction reciprocal space maps reveal that FePc and CoPc molecules adopt a combination of herringbone and brickstone arrangement on SiOx/Si and polycrystalline gold substrate, which can have significant implications on the optoelectronic properties of the films due to unique molecular stacking.

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“…Four scans on the irradiated regions and two spectra outside the irradiated regions were measured on the same day and analysis conditions, in order to avoid possible errors in the measurements due to aging effects of the CoPcs with time. 23,233 The vibrations of the CoPc planar molecule (a scheme is shown in Figure 7.1), which consists of 57 atoms, can be classified into the following irreducible representation (taking into account only internal vibrations): [234][235][236][237] Γ vibrational = 14A 1g + 13A 2g + 14B 1g + 13E g + 6A 1u + 8A 2u + 7B 1u + 7B 2u + 28E u (7.1) These modes can be divided into three categories: modes active in Raman scattering, modes active in IR spectra and modes that are neither active in Raman nor IR spectra (but these become active in Raman, as a result of an interaction with the support, if a distortion of the molecular symmetry occurs). The basic Raman selection rules allow A 1g , B 1g , B 2g , and E g modes in the normal Raman scattering.…”

Section: Raman Spectroscopy Of Copc/au Samples Irradiated With X-raysmentioning

confidence: 99%

Modified Au-Based Nanomaterials Studied by Surface Plasmon Resonance Spectroscopy

Serrano

2015

Springer Theses

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A mis padres y hermanosA Raúl "La educación es el arma más poderosa para cambiar el mundo", Nelson Mandela, 1918-2013 "Experimental physics cannot do without instruments", Jean-Antoine Nollet, 1700-1770. AgradecimientosDurante el desarrollo de esta Tesis, muchas son las personas e instituciones involucradas a las que me gustaría dar las gracias. Sin su ayuda y apoyo, este trabajo no hubiera sido posible.En primer lugar quiero dar las gracias de manera muy especial al Dr. MiguelÁngel García y al Dr.Óscar Rodríguez por haberme dirigido la tesis. Un millón de gracias por creer en mí y haberme enseñado tanto, por motivarme, guiarme y ayudarme a crecer en el mundo de la investigación, por esos turnos en Spline, por los viajes, por esas charlas,... Ha sido una suerte contar con vosotros tanto en el trabajo como a nivel personal.Al Dr. Germán Castro. Gracias por aceptar la idea loca de montar un sistema de plasmones en la línea de absorción, por involucrarte como el que más, porque siempre estás disponible para hablar y enseñar ciencia. Por tu vitalidad y energía inagotable.Al Prof. José Francisco Fernández Lozano, por sus buenos consejos, su disposición, sus ideas y su dedicación. Gracias por introducirme en el mundo de la empresa e iniciarme en el campo de la cerámica.Al Prof. José Llopis por su gran ayuda en mis inicios y sus interesantes lecciones sobre plasmones. A la Dra. Noemí Carmona, por su buena disponiblidad yánimo. Gracias por acercarme a los vidrios históricos.Al Prof. Juan Rojo, a la Dra. Arantzazu Mascaraque, al Dr. MiguelÁngel González y todo el grupo de Ciencia de Superficies de la Universidad Complutense de Madrid, por hacerme siempre un hueco para medir en el AFM, por dejarme ir a hablaros de mi trabajo, por vuestras ideas, ayuda yánimo.También gustaría agradecer a la Dra. Mar García y a la Dra. Alicia de Andrés, del Instituto de Ciencia de Materiales de Madrid, por las medidas magnéticas (no presentadas en este trabajo) y por la discusión sobre las medidas Raman, respectivamente. A Charlie, porque no hay mejor compañía para trabajar en el laboratorio. A Eva, la nueva incorporación del grupo, que está más que integrada. A los que se han ido pero se dejan ver: Mara, Helen, Leti, Alberto A., Quique, Monikaka, Marta, MariCani,..., porque siempre es un buen momento estar con vosotr@s, dentro y fuera del trabajo. ¡Muchas gracias! De manera muy especial me gustaría dar las gracias a Esther y Cris, porque desde que empezamos la carrera siempre habéis estado ahí para apoyarme y tirar de mí cuando más lo necesitaba. Gracias Esther por coger el relevo y hacer de becaria por unos días. Por esos cotilleos, tan necesarios para empezar el día. Porque siempre puedo contar contigo y sabes sacar lo mejor de mí. Gracias Cris, porque siempre estás ahí para cualquier cosa.Porque sabes escuchar y animarme en los no mejores momentos. Porque vuestro esfuerzo y dedicación sólo merecen mi admiración. ¡Gracias chicas! A los del Sauco, por todos los buenos momentos vividos, las risas, los pre-extras, las carreras, porque con v...

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Temperature and orientation study of cobalt phthalocyanine CoPc thin films deposited on silicon substrate as studied by micro-Raman scattering spectroscopy

Cited by 20 publications

References 20 publications

Ultrathin 2D Cobalt Zeolite‐Imidazole Framework Nanosheets for Electrocatalytic Oxygen Evolution

Ultrathin 2D Cobalt Zeolite‐Imidazole Framework Nanosheets for Electrocatalytic Oxygen Evolution

Influence of substrate on molecular order for self‐assembled adlayers of CoPc and FePc

Modified Au-Based Nanomaterials Studied by Surface Plasmon Resonance Spectroscopy

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