First-principles investigation of the orientation influenced He dissolution and diffusion behaviors <b>on</b> W surfaces

Pan, Guoqiang; Li, Y. G.; Zhang, Y. S.; Zhang, C. G.; Zhao, Zihao; Zhang, Zhi

doi:10.1039/c7ra03281a

Cited by 14 publications

(4 citation statements)

References 49 publications

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“…For instance, Li et al. [ 31 ] introduced CDs with strong fluorescence into PNIPAM hydrogels via atom transfer radical polymerization. The CD/PNIPAM hybrid hydrogel showed a dramatic change in its fluorescence intensity at a lower critical solution temperature of 33 °C.…”

Section: Design and Construction Of Pgisdsmentioning

confidence: 99%

Recent Progress in Smart Polymeric Gel‐Based Information Storage for Anti‐Counterfeiting

Sun

Zhou³

et al. 2022

Advanced Materials

164

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decryption processes. Furthermore, these traditional anti-counterfeiting strategies are easily duplicated and are unable to counter the growing number of forgery techniques because they are widely recognized. Therefore, there is an urgent need to develop new anti-counterfeiting materials and innovative encryption/decryption approaches to endow stored information with higher security.In recent decades, polymeric gels have been developed as novel materials with programmable 3D network structures that are adaptable and inclusive, showing great potential for applications in various fields such as soft robotics, tissue engineering and information storage. [12][13][14][15][16][17][18][19] Among these, smart gels that exhibit shape morphing or color changes when exposed to external stimuli (e.g., light, heat, electricity, magnetism, mechanical force, or chemicals) have gained much attention. [20][21][22][23] Owing to its unique stimulus-responsiveness, a smart polymeric gel has been proven to be an excellent candidate for information encryption/decryption, exhibiting dynamic information output and a much higher security level. In general, an anti-counterfeiting process consists of three steps: coding, encryption, and decryption. For smart gel-based information storage devices, the external stimulus is the key to the decryption, and the tunable optical properties of the gel are utilized for coding. In other words, the information loaded on the gel is invisible or fake under normal circumstances, and the recipient can obtain the desired message only when the encrypted message is exposed to a particular external stimulus.Although polymeric gel-based information storage devices (PGISDs) are still in their infancy, there has been strong worldwide interest in this field. However, no related review has provided an in-depth overview of gel-based information storage for anti-counterfeiting. This review provides a tutorial overview that summarizes the recent progress in PGISDs, focusing on the preparation methods for gels with adjustable optical properties, their encryption/decryption mechanisms, and how to improve the security level using their dimensions and colors. As depicted in Figure 1, anti-counterfeiting materials based on elaborate gel systems show excellent encryption/decryption behaviors by adjusting either their chemical colors in the presence or absence of UV irradiation or physical colors under visible light (absorption/transmittance, refraction/scattering, and interference/diffraction). Endowing gels that display polychromic colors with stored information can achieve multilevel Information security protection has a tremendous impact on human life, social stability and national security, leading to the rapid development of anti-counterfeiting materials and related techniques. However, the traditional stored information on hard or dry media is often static and lacks functions, which makes it challenging to deal with increasing and powerful counterfeiting technologies. Modified intelligent polymeric gels exhibit color...

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Section: Design and Construction Of Pgisdsmentioning

confidence: 99%

Recent Progress in Smart Polymeric Gel‐Based Information Storage for Anti‐Counterfeiting

Sun

Zhou³

et al. 2022

Advanced Materials

164

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“…12), which is consistent with the results reported in Refs. [48][49][50] using other simulation methods. Thus, the nanochannels not only shorten the diffusion distance of He atoms, but also promote the accumulation of He atoms at the nanochannel surfaces.…”

Section: Simulationmentioning

confidence: 99%

Review on helium behaviors in nanochannel tungsten film

et al. 2021

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Tungsten (W) as plasma facing material (PFM) needs to face an unprecedented harsh environment in the fusion reactor, which puts forward high requirements for its radiation tolerance. Among the many challenges, the rapid accumulation of helium (He) atoms to form numerous bubbles or even "fuzzy" nanostructure leads to swelling and embrittlement of W matrix and seriously shorten its service life, which is one of the most serious problems faced by PFM-W at present. In this review, we summarize the recent works on the nanochannel W films with high surface-to-volume ratio deposited by magnetron sputtering, and the behaviors of He in the nanochannel W films at different fusion-related irradiation environment. Experimental and simulation results showed that the nanochannel W films have better radiation tolerance performance in managing He behaviors than that of commercial bulk W.

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“…The average He-He binding energy in clusters is obtained as follows: Moreover, the He clusters (or a single He) induce the formation of W vacancies, interstitial atoms, and complexes in bulk W and on the W surface. [1,9,11] As the cluster size increases, the defects and vacancies become more obvious, as shown in Fig. 4.…”

Section: -2mentioning

confidence: 99%

“…Several other calculations have focused on the He dissolution and diffusion behavior on W surfaces. Pan et al [9] determined that He prefers to induce vacancies and interstitial W formations near the surfaces, which causes He accumulation on the surfaces. Hu et al [10] showed that trap mutation is an important reaction and found that this process significantly affects W surface morphology, structure, and He 𝑚 -V complex formation.…”

mentioning

confidence: 99%

Clustering and Dissolution of Small Helium Clusters in Bulk Tungsten

Wan¹,

Yu²,

Ju³

2018

Chinese Phys. Lett.

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Density functional theory calculations are conducted to investigate the stability and interactions among small helium (He) clusters in bulk tungsten (W). The lowest energy structure of each cluster for sizes n = 1 to 6 is determined. With the formation of He clusters, He defects form in bulk W. The thermodynamics of the clusters are investigated in the temperature range of 1000–2300K using molecular dynamics. This study provides the information essential to understand small He cluster behavior in bulk W.

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First-principles investigation of the orientation influenced He dissolution and diffusion behaviors on W surfaces

Abstract: The dissolution and diffusion behaviors of helium (He) for four low-Miller-index tungsten (W) surfaces [(110),

Cited by 14 publications

References 49 publications

Recent Progress in Smart Polymeric Gel‐Based Information Storage for Anti‐Counterfeiting

Recent Progress in Smart Polymeric Gel‐Based Information Storage for Anti‐Counterfeiting

Review on helium behaviors in nanochannel tungsten film

Clustering and Dissolution of Small Helium Clusters in Bulk Tungsten

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