Laser-induced interfacial state changes enable tuning of the Schottky-barrier height in SiC

Zhao, Lin; Ji, Lingfei; Wu, Yan; Hu, Liting; Yan, Tianyang; Sun, Zhenrong

doi:10.1016/j.apsusc.2018.11.015

Cited by 12 publications

(4 citation statements)

References 41 publications

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“…Meanwhile, the incorporated CD also induced some additional SiC bonds with lower bond energy as revealed by much more obvious NMR signals corresponding to T 1 (RSi(OSi)(OH) 2 ), T 2 (RSi(OSi) 2 (OH)), and T 3 (RSi(OSi) 3 ) sites (R = π-conjugated carbon group) in CD@MSN than those in MSN (Figure K) and the emerged peaks at low binding energy in Si 2p and C 1s XPS of CD@MSN (Figure S4F–H). As a result, CD@MSN not only reserved the similar negative surface potential of −24.0 mV (Figure S5) with good water dispersibility (Figure S6) and negligible cytotoxicity (Figure S7) as pristine MSN, but also exhibited an obvious blacker solution with enhanced vis-NIR absorption and higher NIR-photothermal ability as compared with pristine CD (Figure F and S4E) due to their condensation in one nanosphere. Very desirably, attributing to framework incorporation-induced swelling and the hydrolyzable SiC bonds, CD@MSN could gradually degrade and release the incorporated CDs under physiological medium as verified by the TEM images (Figures A–E and S8), inductively coupled plasma-optical emission spectroscopy (ICP-OES) analysis (Figure S9) and the decreased particle sizes (Figures G and S10) .…”

Section: Resultsmentioning

confidence: 96%

Biodegradable Mesoporous Silica Achieved via Carbon Nanodots-Incorporated Framework Swelling for Debris-Mediated Photothermal Synergistic Immunotherapy

Qian

Chen

et al. 2019

Nano Lett.

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Incorporating carbon nanodots (CDs) into mesoporous silica framework for extensive biomedicine, especially for the desirable cancer immunotherapy, is considered to be an unexplored challenge. Herein, a hydrogen bond/electrostatic-assisted co-assembly strategy was smartly exploited to uniformly incorporate polymer-coated CDs into ordered framework of mesoporous silica nanoparticles (CD@ MSNs). The obtained CD@MSN was not only biodegradable via the framework-incorporated CD-induced swelling but also capable of gathering dispersive CDs with enhanced photothermal effect and elevated targeting accumulation, which therefore can achieve photothermal imaging-guided photothermal therapy (PTT) in vitro and in vivo. Interestingly, benefiting from the biodegraded debris, it was found that CD@MSN-mediated PTT can synergistically achieve immunemediated inhibition of tumor metastasis via stimulating the proliferation and activation of natural killer cells and macrophages with simultaneously up-regulating the secretion of corresponding cytokines (IFN-γ and Granzyme B). This work proposed an unusual synthesis of biodegradable mesoporous silica and provided an innovative insight into the biodegradable nanoparticlesassociated anticancer immunity.

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Section: Resultsmentioning

confidence: 96%

Biodegradable Mesoporous Silica Achieved via Carbon Nanodots-Incorporated Framework Swelling for Debris-Mediated Photothermal Synergistic Immunotherapy

Qian

Chen

et al. 2019

Nano Lett.

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“…This effect also can be supported by the lattice damage caused by the implantation [8]. The result is an accumulation of N-doped graphene layer near the surface after laser irradiation [9]. Owing to the formation of the carbon layer after the laser irradiation, the Schottky barrier at the interface of n-type SiC is reduced [5].…”

Section: Resultsmentioning

confidence: 96%

Low-Resistance Ohmic Contact Formation by Laser Annealing of N-Implanted 4H-SiC

Hellinger

Rusch

Rommel

et al. 2020

MSF

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In this work, pulsed-laser-based tempering was applied for post-implant annealing of n-type N-doped 4H-SiC in order to electrically activate the dopants and to rebuild the crystal structure. The annealing was performed by a frequency-tripled Nd:YVO4 laser with a pulse duration of 60 ns. To evaluate the effects of post-implant annealing, JBS diodes were electrically characterized. The results were compared with implanted, not post-annealed JBS diodes. The electrical measurements showed a significant on-state voltage drop of 40 mV at 6 A for post-implant laser annealed diodes compared to not post-implant annealed diodes.

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“…➀ Fabricating a catalyst with Schottky barrier. Metals and semiconductors can form a Mott-Schottky junction, which is a simple metal-semiconductor interface, where electrons flow directionally between the metal and the semiconductor, with non-linear impedance characteristics (Lin et al, 2019;Kw et al, FIGURE 1 Surface structure of rutile TiO 2 (Yang et al, 2022). (A) Asymmetric adsorption mode of nitrobenzene, and (B) symmetric adsorption mode of nitrobenzene.…”

Section: Tiomentioning

confidence: 99%

Recent advances on catalysts for photocatalytic selective hydrogenation of nitrobenzene to aniline

Guo

Liu²,

Li³

et al. 2023

Front. Chem.

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Selective hydrogenation of nitrobenzene (SHN) is an important approach to synthesize aniline, an essential intermediate with extremely high research significance and value in the fields of textiles, pharmaceuticals and dyes. SHN reaction requires high temperature and high hydrogen pressure via the conventional thermal-driven catalytic process. On the contrary, photocatalysis provides an avenue to achieve high nitrobenzene conversion and high selectivity towards aniline at room temperature and low hydrogen pressure, which is in line with the sustainable development strategies. Designing efficient photocatalysts is a crucial step in SHN. Up to now, several photocatalysts have been explored for photocatalytic SHN, such as TiO2, CdS, Cu/graphene and Eosin Y. In this review, we divide the photocatalysts into three categories based on the characteristics of the light harvesting units, including semiconductors, plasmonic metal-based catalysts and dyes. The recent progress of the three categories of photocatalysts is summarized, the challenges and opportunities are pointed out and the future development prospects are described. It aims to give a clear picture to the catalysis community and stimulate more efforts in this research area.

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Laser-induced interfacial state changes enable tuning of the Schottky-barrier height in SiC

Cited by 12 publications

References 41 publications

Biodegradable Mesoporous Silica Achieved via Carbon Nanodots-Incorporated Framework Swelling for Debris-Mediated Photothermal Synergistic Immunotherapy

Biodegradable Mesoporous Silica Achieved via Carbon Nanodots-Incorporated Framework Swelling for Debris-Mediated Photothermal Synergistic Immunotherapy

Low-Resistance Ohmic Contact Formation by Laser Annealing of N-Implanted 4H-SiC

Recent advances on catalysts for photocatalytic selective hydrogenation of nitrobenzene to aniline

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