Thermal stability of crystalline thin films

Jiang, Q.; Tong, Hao; Hsu, D. T.; Okuyama, Kikuo; Shi, Frank G.

doi:10.1016/s0040-6090(97)00732-3

Cited by 122 publications

(156 citation statements)

References 33 publications

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“…The Debye temperature and hence the specific heat C P is size and temperature dependent [90,291]. This effect may lead to 3e5% deviation of the C P .…”

Section: 213mentioning

confidence: 99%

Size dependence of nanostructures: Impact of bond order deficiency

Sun

2007

Progress in Solid State Chemistry

815

717

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“…The Debye temperature and hence the specific heat C P is size and temperature dependent [90,291]. This effect may lead to 3e5% deviation of the C P .…”

Section: 213mentioning

confidence: 99%

Size dependence of nanostructures: Impact of bond order deficiency

Sun

2007

Progress in Solid State Chemistry

815

717

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“…As pointed out in the experimental observations for free nanocrystals or epitaxial thin films on inert substrates [134,257], there exist different degrees of spin-spin interactions between inner and surface atoms because of the reduction in the number of spin interactions at the surface with increase of lattice vibration [5,113,12,122,258]. For thin films with strong film/substrate interaction, the vibration of atoms there is depressed.…”

Section: In Order To Interpret T N (D) In a Unified Form T N (D)mentioning

confidence: 99%

Size Dependence of Structures and Properties of Magnetic Materials

Jiang¹,

Lang²

2007

TONANOJ

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Due to the involvement of high portion of atomic coordination imperfection in surfaces and interfaces, the properties of magnetic nanocrystals dramatically differ from that of the corresponding bulk counterparts, which have led to a surge in both experimental and theoretical investigations in the past decades. This review summarizes the studies for these size-dependent magnetic properties, and additional thermal or phase stabilities, and mechanical properties. To interpret the above phenomena, a thermodynamic model for the size dependence and interface dependences of these properties is described, which is based on Lindemann s criterion for melting, Mott s expression for the vibrational melting entropy, and Shi s model for the size-dependent melting temperature. The model without any adjustable parameter is confirmed by a large number of experimental results, and helps us to understand the structures and properties of the magnetic nanocrystals. Moreover, other theoretical works on the above properties are also mentioned and commented.

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“…73 Equation (13) has been highly successful in describing T m shifts with geometrical confinement in diverse materials, including polymers. [74][75][76][77][78][79][80] When confinement becomes comparable to 4 − 6 times the molecular size, it is known that Eq. (13) starts to fail, 50 corresponding to the thinnest films we examine.…”

Section: Gibbs-thomson Model For Finite-size Dependence Of T Gmentioning

confidence: 99%

A unifying framework to quantify the effects of substrate interactions, stiffness, and roughness on the dynamics of thin supported polymer films

Hanakata

Betancourt

Douglas

et al. 2015

The Journal of Chemical Physics

129

180

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Changes in the dynamics of supported polymer films in comparison to bulk materials involve a complex convolution of effects, such as substrate interactions, roughness, and compliance, in addition to film thickness. We consider molecular dynamics simulations of substrate-supported, coarse-grained polymer films where these parameters are tuned separately to determine how each of these variables influence the molecular dynamics of thin polymer films. We find that all these variables significantly influence the film dynamics, leading to a seemingly intractable degree of complexity in describing these changes. However, by considering how these constraining variables influence string-like collective motion within the film, we show that all our observations can be understood in a unified and quantitative way. More specifically, the string model for glass-forming liquids implies that the changes in the structural relaxation of these films are governed by the changes in the average length of string-like cooperative motions and this model is confirmed under all conditions considered in our simulations. Ultimately, these changes are parameterized in terms of just the activation enthalpy and entropy for molecular organization, which have predictable dependences on substrate properties and film thickness, offering a promising approach for the rational design of film properties. C 2015 AIP Publishing LLC. [http://dx

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Thermal stability of crystalline thin films

Cited by 122 publications

References 33 publications

Size dependence of nanostructures: Impact of bond order deficiency

Size dependence of nanostructures: Impact of bond order deficiency

Size Dependence of Structures and Properties of Magnetic Materials

A unifying framework to quantify the effects of substrate interactions, stiffness, and roughness on the dynamics of thin supported polymer films

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