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Turak, Buket; Üçgül, İbrahim

doi:10.5505/apjes.2015.72691

Cited by 3 publications

(1 citation statement)

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“…While several strategies have been developed for surface patterning, including embossing, etching and lithography, 6 they often bring the disadvantage of requiring post-processing treatments, which add to the overall cost and time of fabrication. 10 In contrast, when used in conjunction with materials designed to exhibit specific functionalities, surface patterning can prove a promising tool that can enhance performance for a wide range of practical applications, 11 including tandem polymer OLEDs, bulk heterojunction photovoltaic cells, 12 sub-micrometer channels in field effect transistors, 13 resist patterning of PMMA or PEDOT leading to the formation of mesoscale patterns for radio frequency ID tags, 14 templated biological micro-electro-mechanical systems, 15 and templated plasmonic structures. 7,8 Spontaneous surface patterning is a result of instabilities in the film caused by the difference of surface energy between the film and the substrate, or phase segregation in the case of spinodal dewetting of multi-component systems.…”

Section: Introductionmentioning

confidence: 99%

Water-triggered spontaneous surface patterning in thin films of mexylaminotriazine molecular glasses

et al. 2015

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Surface patterning that occurs spontaneously during the formation of a thin film is a powerful tool for controlling film morphology at the nanoscale level because it avoids the need for further processing. However, one must first learn under which conditions these patterning phenomena occur or not, and how to achieve control over the surface morphologies that are generated. Mexylaminotriazine-based molecular glasses are small molecules that can readily form amorphous thin films. It was discovered that this class of materials can either form smooth films, or films exhibiting either dome or pore patterns. Depending on the conditions, these patterns can be selectively obtained during film deposition by spin-coating. It was determined that this behavior is controlled by the presence of water or, more generally, of a solvent in which the compounds are insoluble, and that the relative amount and volatility of this poor solvent determines which type of surface relief is obtained. Moreover, AFM and FT-IR spectroscopy have revealed that the thin films are amorphous independently of surface morphology, and no difference was observed at the molecular or supramolecular level. These findings make this class of materials and this patterning approach in general extremely appealing for the control of surface morphology with organic nanostructures.

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Section: Introductionmentioning

confidence: 99%

Water-triggered spontaneous surface patterning in thin films of mexylaminotriazine molecular glasses

et al. 2015

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Identification of water use behavior and calculation of water footprint: a case study

Okutan

Akkoyunlu

2021

Appl Water Sci

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This article adds to the literature on the investigation of water use behavior of people under their daily routines. A self-administrated survey of water users was conducted for both graduate and undergraduate students at Boğaziçi University, Turkey in 2019. This study quantifies and maps the water footprint (WF) of Boğaziçi University (BU). It reports preferences of students and personnel in terms of indoor water use, outdoor water use, and virtual water use such as transportation, shopping, and dietary preferences. Water footprints are estimated per person for both engineering students and all students of BU. WF of an average BU student is above the average WF of Turkey as well as the average global WF. The attributes that influence the water use behavior of people were broadly categorized into two groups, which were dietary preferences and shopping preferences. Moreover, the eating pattern of a person regarding whether a person consumes meat was the largest contributor to the WF of BU. The results of this study can help to develop a basic understanding of WF and how it is affected by people's choices. This study is also unique by calculating water footprint in terms of direct and virtual water footprint by considering people’s daily choices in Turkey.

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Properties of textile air conditioner waste dust-filled polyurethane rigid foam composites

Buzğan

Kaya

Kertmen

et al. 2021

Plastics, Rubber and Composites

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This paper investigates the morphology, mechanical and thermal insulation properties of textile air conditioner dust-filled polyurethane (PU) rigid foams. Textile air conditioner dust occurs during the spinning process of staple fibres. It consists of cotton fibre impurities as boll, leaf, and short fibres that generate a vast environmental load. This dust is used as a filler and dispersed in polyurethane up to 40% wt. The cell -size of foams decreased and cell -density increased by the increase in filler ratios in which the dust acted as a heterogeneous nucleation site during cell formation. The dust agglomerated in polyurethane foam and induced irregular cell wall and hence non-uniform cell formation and many broken cells. The flexural strength and modulus decreased in higher dust content (40% wt.). The lower thermal insulation of cellulose-based dust and damaged structure/uniformity of foam cells resulted in an unstable/lower thermal conductivity of dust-filled polyurethane rigid foam composites.

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Untitled

Cited by 3 publications

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Water-triggered spontaneous surface patterning in thin films of mexylaminotriazine molecular glasses

Water-triggered spontaneous surface patterning in thin films of mexylaminotriazine molecular glasses

Identification of water use behavior and calculation of water footprint: a case study

Properties of textile air conditioner waste dust-filled polyurethane rigid foam composites

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