Muscovite mica as a growth template of PC<sub>61</sub>BM crystallites for organic photovoltaics

Feenstra, Jon; Eerden, Maarten van; Lemmens, Alexander K.; Poel, Wester de; Kouwer, Paul H. J.; Rowan, Alan E.; Schermer, J.J.

doi:10.1039/c6ce02492k

Cited by 4 publications

(3 citation statements)

References 57 publications

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“…This must be due to the hydrophobic OPSS-PEG-DOTA layer preventing particle aggregation, in good agreement with the TEM images in Figure B, and making it easier for the tip to break through the NP layer, as well as reducing the capillary attractive forces between the NPs and the tip. AFM contact-mode images (Figure C, inset) support this assumption: DOTA-coated NPs display two-dimensional and nearly one-dimensional aggregates in a hexagonal distribution pattern matching the hexagonal symmetry of the mica substrate, − an indication that NP–substrate interactions are stronger than NP–NP interactions.…”

Section: Resultsmentioning

confidence: 88%

“…AFM contact-mode images (Fig. 5C, inset) support this assumption: DOTA-coated NPs display two-dimensional and nearly one-dimensional aggregates in a hexagonal distribution pattern matching the hexagonal symmetry of the mica substrate, [47][48][49] an indication that NPsubstrate interactions are stronger than NP-NP interactions. Force-distance curves for gold NPs coated with OPSS-PEG-SVA-AB ( Fig.…”

Section: Force Distance Spectroscopymentioning

confidence: 97%

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Physicochemical Tools: Toward a Detailed Understanding of the Architecture of Targeted Radiotherapy Nanoparticles

Cabello

Nwoko

Mingarelli

et al. 2018

ACS Appl. Bio Mater.

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Targeted radiotherapy is proving to be an effective alternative to external beam radiotherapy for cancer treatment. Gold nanoparticles are bio-compatible, commercially available and readily functionalised, which makes them perfect candidates for the delivery of cytotoxic radionuclides labelled with antibodies to proteins abnormally expressed on cancer tissue. However, there is a lack of information regarding the efficacy of the successive modification steps involved in the functionalisation process, as well as of the actual final state of the nanoparticles prior to preclinical tests, which results in a very inefficient screening and that will further impact on biological barriers, such as half-life interactions with serum proteins. Here, gold nanoparticles (15 nm diameter) were functionalised with linkers for antibody and radionuclide conjugation, following a well-stablished method. Successful coating of the gold nanoparticles was demonstrated using state-of-the-art physico-chemical techniques, which include TEM, AF4-UV-ICPMS-MALS, Raman spectroscopy and force-distance spectroscopy, which have led to an accurate description of the hydrodynamic diameter of the functionalized NPs and also about the adhesion energy and elastic properties of the modified NPs. Successive steps involved in the coating led to an organic shell of 12 nm diameter and no nanoparticle aggregation was observed. This may be a consequence of a decrease (or even the total absence) of water adsorption on the metal surface and/or of the organic labelling, that decreases the surface tension of the particles as estimated from the atomic force microscopy force-distance curves. Radiolabelling of gold nanoparticles pre-screened using these physico-chemical tools with 177 Lu resulted in > 75% efficiency.

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Section: Resultsmentioning

confidence: 88%

Section: Force Distance Spectroscopymentioning

confidence: 97%

Physicochemical Tools: Toward a Detailed Understanding of the Architecture of Targeted Radiotherapy Nanoparticles

Cabello

Nwoko

Mingarelli

et al. 2018

ACS Appl. Bio Mater.

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“…In this study, the structural and electronic properties of a heteroepitaxial molecular p–n heterojunction formed by stacking TANC on PnSC surfaces were investigated by non-contact mode atomic force microscopy (nc-AFM), grazing-incidence X-ray diffraction (GIXD), X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS), and ultraviolet-visible absorption spectroscopy (UV-vis). Heteroepitaxy has been used as a fundamental technology for obtaining highly ordered semiconductor crystallites and can also be applied for van der Waals molecular materials [ 13 , 14 ]. For example, C 60 molecules form heteroepitaxial overlayers of an in-plane mean crystallite size of over 100 nm on the single-crystal surfaces of pentacene and rubrene [ 15 , 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Interface Structures and Electronic States of Epitaxial Tetraazanaphthacene on Single-Crystal Pentacene

et al. 2021

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The structural and electronic properties of interfaces composed of donor and acceptor molecules play important roles in the development of organic opto-electronic devices. Epitaxial growth of organic semiconductor molecules offers a possibility to control the interfacial structures and to explore precise properties at the intermolecular contacts. 5,6,11,12-tetraazanaphthacene (TANC) is an acceptor molecule with a molecular structure similar to that of pentacene, a representative donor material, and thus, good compatibility with pentacene is expected. In this study, the physicochemical properties of the molecular interface between TANC and pentacene single crystal (PnSC) substrates were analyzed by atomic force microscopy, grazing-incidence X-ray diffraction (GIXD), and photoelectron spectroscopy. GIXD revealed that TANC molecules assemble into epitaxial overlayers of the (010) oriented crystallites by aligning an axis where the side edges of the molecules face each other along the [1¯10] direction of the PnSC. No apparent interface dipole was found, and the energy level offset between the highest occupied molecular orbitals of TANC and the PnSC was determined to be 1.75 eV, which led to a charge transfer gap width of 0.7 eV at the interface.

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van der Waals heteroepitaxy on muscovite

Yen

Bitla

Chu

2019

Materials Chemistry and Physics

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Muscovite mica as a growth template of PC₆₁BM crystallites for organic photovoltaics

Abstract: The processing conditions for and (local) performance benefits of epitaxially crystallized PC61BM for organic solar cells are investigated.

Cited by 4 publications

References 57 publications

Physicochemical Tools: Toward a Detailed Understanding of the Architecture of Targeted Radiotherapy Nanoparticles

Physicochemical Tools: Toward a Detailed Understanding of the Architecture of Targeted Radiotherapy Nanoparticles

Interface Structures and Electronic States of Epitaxial Tetraazanaphthacene on Single-Crystal Pentacene

van der Waals heteroepitaxy on muscovite

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Muscovite mica as a growth template of PC61BM crystallites for organic photovoltaics

Abstract: The processing conditions for and (local) performance benefits of epitaxially crystallized PC61BM for organic solar cells are investigated.

Cited by 4 publications

References 57 publications

Physicochemical Tools: Toward a Detailed Understanding of the Architecture of Targeted Radiotherapy Nanoparticles

Physicochemical Tools: Toward a Detailed Understanding of the Architecture of Targeted Radiotherapy Nanoparticles

Interface Structures and Electronic States of Epitaxial Tetraazanaphthacene on Single-Crystal Pentacene

van der Waals heteroepitaxy on muscovite

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Product

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Muscovite mica as a growth template of PC₆₁BM crystallites for organic photovoltaics