Formation of rubrene nanocrystals by laser ablation in liquids utilizing MAPLE deposited thin films

O’Malley, Sean M.; Amin, Mitesh; Borchert, James W.; Jimenez, Richard; Steiner, Matthew A.; Fitzgerald, James W.; Bubb, D. M.

doi:10.1016/j.cplett.2014.02.009

Cited by 14 publications

(9 citation statements)

References 31 publications

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“…In the last decade, the trend is switching from traditional LBM to hybrid LBM by coupling some other phenomenon/process to LBM setup. The coupling process could be chemical etching [6], [7], electrochemical machining [8], ultrasonic machining [9], [10], electric discharge machining [11], water jet [12] and liquid film [13] etc. The common motive to this hybrid approach is to minimize/alleviate the traditional LBM's drawbacks such as thermal damage, heat affected zone (HAZ), low ablation rate, cracking and melt re-deposition.…”

Section: Introductionmentioning

confidence: 99%

Laser Ablation and Laser-Hybrid Ablation Processes: A Review

Ahmed¹,

Darwish²,

Alahmari³

2015

Materials and Manufacturing Processes

101

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade in order to build a relatively new route of laser-hybrid processes. This paper reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes. The article also highlights the research gaps and future research directions in the context of laser and laser-hybrid ablation.

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Section: Introductionmentioning

confidence: 99%

Laser Ablation and Laser-Hybrid Ablation Processes: A Review

Ahmed¹,

Darwish²,

Alahmari³

2015

Materials and Manufacturing Processes

101

View full text Add to dashboard Cite

show abstract

“…In the last decade, the trend is switching from traditional LBM to hybrid LBM by coupling some other phenomenon/process to LBM setup. The coupling process could be chemical etching [5,6], electrochemical machining [7], ultrasonic machining [8,9], electric discharge machining [10], water jet [11] and liquid film [12] etc. The common motive to this hybrid approach is to minimize/alleviate the traditional LBM's drawbacks such as thermal damage, heat affected zone (HAZ), low ablation rate, cracking and melt re-deposition.…”

Section: Introductionmentioning

confidence: 99%

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Darwish

Ahmed

Al‐Ahmari

2016

Advanced Structured Materials

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Laser beam machining (LBM) has proven its applications and advantages over almost all the range of engineering materials. It offers its competences from macro machining to micro and nano-machining of simple-to-complex shapes. The flipside of LBM is the existence of universal problems associated with its thermal ablation mechanism. In order to alleviate or reduce the inherent problems of LBM, a massive research has been done during the past decade and in turn build a relatively new route of laser-hybrid processes. The hybrid approaches in laser ablation have demonstrated much improved results in terms of material removal rate, surface integrity, geometrical tolerances, thermal damage, metallurgical alterations and many more. This chapter reviews the research work carried out so far in the area of LBM and its hybrid processes for different materials and shapes.

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“…Different substrates were used (Si and SiO 2 ); therefore, the effect of solvent content on the observed band intensities is unclear. The band at 523 nm (2.37 eV) is associated with the π–π* transition and the remaining vibronic progression with the stretching of C-C bonds [ 41 , 44 ]. The main band (523 nm) lies slightly higher in energy (2.37 eV) compared with thermally evaporated films (2.225 eV), while the vibronic peak separation of ~0.17 eV is preserved [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

“…Recently, MAPLE has been used for the growth of RB nanocrystals [ 41 ] and in the fabrication of RB layers [ 42 ]. The slight increase in crystallinity, compared to films fabricated by PLD [ 4 ], is accompanied by RB thermal and photochemical decomposition, and a dependence on deposition parameters was observed.…”

Section: Introductionmentioning

confidence: 99%

Rubrene Thin Films with Viably Enhanced Charge Transport Fabricated by Cryo-Matrix-Assisted Laser Evaporation

et al. 2021

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Among organic semiconductors, rubrene (RB; C42H28) is of rapidly growing interest for the development of organic and hybrid electronics due to exceptionally long spin diffusion length and carrier mobility up to 20 cm2V−1s−1 in single crystals. However, the fabrication of RB thin films resembling properties of the bulk remains challenging, mainly because of the RB molecule’s twisted conformation. This hinders the formation of orthorhombic crystals with strong π–π interactions that support the band transport. In this work, RB films with a high crystalline content were fabricated by matrix-assisted laser evaporation and the associated structure, composition, and transport properties are investigated. Enhanced charge transport is ascribed to the crystalline content of the film. Spherulitic structures are observed on top of an amorphous RB layer formed in the initial deposition stage. In spherulites, orthorhombic crystals dominate, as confirmed by X-ray diffraction and the absorption and Raman spectra. Surprisingly, nanowires several microns in length are also detected. The desorption/ionization mass and X-ray photoelectron spectra consistently show minimal material decomposition and absence of RB peroxides. The observed carrier mobility up to 0.13 cm2V−1s−1, is close to the technologically accepted level, making these rubrene films attractive for spintronic and optoelectronic applications.

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Formation of rubrene nanocrystals by laser ablation in liquids utilizing MAPLE deposited thin films

Cited by 14 publications

References 31 publications

Laser Ablation and Laser-Hybrid Ablation Processes: A Review

Laser Ablation and Laser-Hybrid Ablation Processes: A Review

Laser Beam Machining, Laser Beam Hybrid Machining, and Micro-channels Applications and Fabrication Techniques

Rubrene Thin Films with Viably Enhanced Charge Transport Fabricated by Cryo-Matrix-Assisted Laser Evaporation

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