Tunable interfacial magnetic–optical properties of Co doped amorphous carbon film induced by charge transfer after acid treatment

Hsu, Hua-Shu; Lü, Pei; Chang, Chi-Lung; Sun, Shih-Jye; Lee, C.H.; Su, Hui-Chia; Chin, Y. Y.; Lin, Hong‐Ji; Chen, C.T.; Mei-Chun, Huang

doi:10.1016/j.carbon.2014.05.043

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…At lower wavelengths, a weaker MCD signal appeared at 300–400 nm (data not shown because of intense noise), and its intensity was found to increase for Pc-INH treated with γ -CD in the same way as observed at 600–720 nm. The remarkable differences in band intensity and position between the MCD signals of Pc-INH with and without γ -CD imply that the MCD does not have the same origin in the two cases 55 . This stands to reason, since the magnitude of MCD signal depends on the time-average of the total change in orbital momentum, which is closely related to a particular electronic transition and g-factor 56 .…”

Section: Resultsmentioning

confidence: 92%

Encapsulation of Isoniazid-conjugated Phthalocyanine-In-Cyclodextrin-In-Liposomes Using Heating Method

Nkanga

Krause

2019

Sci Rep

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Liposomes are reputed colloidal vehicles that hold the promise for targeted delivery of anti-tubercular drugs (ATBDs) to alveolar macrophages that host Mycobacterium tuberculosis. However, the costly status of liposome technology, particularly due to the use of special manufacture equipment and expensive lipid materials, may preclude wider developments of therapeutic liposomes. In this study, we report efficient encapsulation of a complex system, consisting of isoniazid-hydrazone-phthalocyanine conjugate (Pc-INH) in gamma-cyclodextrin ( γ -CD), in liposomes using crude soybean lecithin by means of a simple organic solvent-free method, heating method (HM). Inclusion complexation was performed in solution and solid-state, and evaluated using UV-Vis, magnetic circular dichroism, 1 H NMR, diffusion ordered spectroscopy and FT-IR. The HM-liposomes afforded good encapsulation efficiency (71%) for such a large Pc-INH/ γ -CD complex (PCD) system. The stability and properties of the PCD-HM-liposomes look encouraging; with particle size 240 nm and Zeta potential −57 mV that remained unchanged upon storage at 4 °C for 5 weeks. The release study performed in different pH media revealed controlled release profiles that went up to 100% at pH 4.4, from about 40% at pH 7.4. This makes PCD-liposomes a promising system for site-specific ATBD delivery, and a good example of simple liposomal encapsulation of large hydrophobic compounds.

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Section: Resultsmentioning

confidence: 92%

Encapsulation of Isoniazid-conjugated Phthalocyanine-In-Cyclodextrin-In-Liposomes Using Heating Method

Nkanga

Krause

2019

Sci Rep

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“…On the other hand, amorphous carbon (a‐C), which is a tunable material with a mixture of sp 2 and sp 3 C and can be grown easily, has also been considered as a non‐volatile memory candidate material . It has been demonstrated that the mechanism is mostly due to clustering of the existing sp 2 sites within the sp 3 matrix.…”

Section: Introductionmentioning

confidence: 99%

The improvement of stable resistive switching in Al/ZnO/Al heterostructures by integration of amorphous carbon layers

Hsu

Chen

et al. 2016

Physica Status Solidi (a)

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This study investigates the effects of inserting amorphous carbon (a‐C) layers between the Al electrode layer and the ZnO insulator layer in Al/ZnO/Al heterostructures on resistive switching (RS) therein. The inserted a‐C layers can play an important role to stabilize RS behavior for random access memory performance. The complex impedance spectra of Al/ZnO/Al devices with and without a‐C inserted layers examined to probe the characteristics of their conducting mechanism. The formation of meta‐stable a‐COx after forming process caused repeatable redox reaction at interfaces, critically affecting RS behaviors.

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“…Moreover, the interfacial effects between FM transitional metals (TMs) and C-based materials have attracted considerable attention. The magnetic proximity effects in transitional metal(TM)/carbon systems have also been evidenced by x-ray magnetic circular dichroism (XMCD) [6][7][8] , ultraviolet-visible (UV-VIS) magnetic circular dichroism MCD 9,10 , and polarized neutron reflectivity 8 . The origin of both the EB phenomenon and the magnetic proximity effect is an interlayer exchange coupling 11 .…”

mentioning

confidence: 99%

Exchange bias in graphitic C/Co composites

Hsu

Chang

Chin

et al. 2017

Carbon

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The exchange bias (EB) effect, which is the shift of the hysteresis loop of a ferromagnet in direct contact with an antiferromagnet, is highly advantageous for the development of spintronics applications. Carbon (C) has been considered as a potential material in next generation electronics production as well as spintronics devices beyond silicon.However, the EB effect has never been reported in C structures. Here we show experimental evidence for an EB in C/Co composites. We apply suitable annealing to induce graphitization by metal contact and thus induce EB at the interfacial antiferromagnetic coupling between Co and local graphene multilayers in a C matrix.The present work makes an advance in this field, as it reports an unexpected EB effect of a C based material.

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Tunable interfacial magnetic–optical properties of Co doped amorphous carbon film induced by charge transfer after acid treatment

Cited by 9 publications

References 24 publications

Encapsulation of Isoniazid-conjugated Phthalocyanine-In-Cyclodextrin-In-Liposomes Using Heating Method

Encapsulation of Isoniazid-conjugated Phthalocyanine-In-Cyclodextrin-In-Liposomes Using Heating Method

The improvement of stable resistive switching in Al/ZnO/Al heterostructures by integration of amorphous carbon layers

Exchange bias in graphitic C/Co composites

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