Lateral Nanopatterns in Thin Diblock Copolymer Films Induced by Selective Solvents

Chen, Yongzhong; Huang, Haiying; Hu, Zhijun; He, Tianbai

doi:10.1021/la0360815

Cited by 52 publications

(63 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Each sphere has a size of %53 nm and a height of %8.5 nm by AFM measurement. After swelling in acetone vapor for 5 h, a well-ordered array of spheres has been established in the entire film [ Figure 1(f)], similar to the spherical morphology obtained by Chen et al [10] The fast Fourier transform (FFT) pattern in the inset of the image indicated a perfect hexagonal packing. A sphere with the size, interval, and a height of 83, 31, and %11.4 nm, respectively were ascertained from this AFM image.…”

Section: Resultssupporting

confidence: 75%

“…[11] Chen et al demonstrated that acetone vapor annealing could produce highly ordered nanoscopic spheres or stripes in symmetric and asymmetric PS-b-PMMA films. [10] Here it is shown that, by similar acetone vapor swelling, besides the nanoprotrusions with a high degree of lateral order or stripes are formed in symmetric PS-b-PMMA thin films as reported, a novel flower-like pattern is observed. We focus on exploring the formation process of highly ordered nanoprotrusions, which was not reported yet.…”

Section: Introductionsupporting

confidence: 70%

“…Increasingly, research has concentrated on the evolution of microstructure and transformation between various phases in response to solvent swelling. [5][6][7][8][9][10][11] Though the preparation process usually leads to the formation of metastable structures that do not represent the melt equilibrium, such structures often exhibit high regularity and may be of particular interest for patterning applications as they significantly increase the number of patterns to be created by a given polymer.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Solvent Induced Sphere Development in Symmetric Diblock Copolymer Thin Films

Peng

Wei

Wang

et al. 2005

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Summary: We follow the time development of the microdomain structure in symmetric polystyrene‐block‐poly(methyl methacrylate) (PS‐b‐PMMA) diblock copolymer thin films during acetone vapor treatment. Besides the highly ordered nanoscopic spheres or stripes as reported previously, a novel so‐called flower‐like pattern, which comprises six PS spheres and each PS sphere belongs to three “flowers” is formed. This finding is very helpful to discuss the highly ordered nanoscopic sphere formation process.Transition from flower‐like structure to well‐ordered arrays of spheres, in which the flower‐like pattern, the transitional morphology, and the ordered spheres are in the portion A, B, and C, respectively.imageTransition from flower‐like structure to well‐ordered arrays of spheres, in which the flower‐like pattern, the transitional morphology, and the ordered spheres are in the portion A, B, and C, respectively.

show abstract

Section: Resultssupporting

confidence: 75%

Section: Introductionsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Solvent Induced Sphere Development in Symmetric Diblock Copolymer Thin Films

Peng

Wei

Wang

et al. 2005

Macromol. Rapid Commun.

View full text Add to dashboard Cite

show abstract

“…Therefore, the macromolecular extension on a substrate in water vapour has nothing in common with the typical well-known reorganisation of block copolymer structures in vapours with different selectivity or preferential affinity for certain blocks. [264][265][266][267] The adsorbed single macromolecules fundamentally differ being essentially planar (two-dimensional) structures and their behaviour is determined by different driving forces as compared to normally observed behaviour of thicker (usually, tens of nanometers) three-dimensional polymer films. [268,269] Thus, we are faced here with completely different mechanism to be discussed below.…”

Section: Vapour-induced Conformational Transitions Of Comb-like Macromentioning

confidence: 99%

Scanning Force Microscopy as Applied to Conformational Studies in Macromolecular Research

Gallyamov

2011

Macromol. Rapid Commun.

View full text Add to dashboard Cite

The modern state of SFM research on polymer nano-objects including single chains is discussed in comparison with other similar high-resolution microscopy techniques. The range of problems to be solved preferentially by SFM is highlighted. Promising methodology to describe quantitatively the morphology of macromolecular objects is proposed. The main benefits of this algorithm seem to be the apparent mathematical correctness as well as the possibility to estimate errors and the confidence of the numbers obtained. Special attention is paid to the dynamic observations of conformational transitions on a substrate in real time regime. This approach allows one to realise direct control of the adsorbed macromolecules by means of exposure to different vapours. Driving forces of the vapour-induced reorganisation are discussed.

show abstract

“…They found that a lower stripe-patterned surface, with the surface pattern period comparable to the bulk lamellar period, and an upper neutral or weakly preferential surface were essential for obtaining long-range ordered perpendicular lamellae. Chen et al [29] used a selective solvent to obtain nanopatterns in thin diblock copolymer films.…”

Section: Introductionmentioning

confidence: 99%

Morphologies of diblock copolymer confined in a slit with patterned surfaces studied by dissipative particle dynamics

Huang

Feng

Liu

et al. 2007

Front. Chem. Eng. China

View full text Add to dashboard Cite

Diblock copolymers with ordered mesophase structures have been used as templates for nano-fabrication. Unfortunately, the ordered structure only exists at micromete rscale areas, which precludes its use in many advanced applications. To overcome this disadvantage, the diblock copolymer confined in a restricted system with a patterned surface is proved to be an effective means to prohibit the formation of defects and obtain perfect ordered domains. In this work, the morphologies of a thin film of diblock copolymer confined between patterned and neutral surfaces were studied by dissipative particle dynamics. It is shown that the morphology of the symmetric diblock copolymer is affected by the ratio of the pattern period on the surface to the lamellar period of the symmetric diblock copolymer and by the repulsion parameters between blocks and wall particles. To eliminate the defects in the lamellar phase, the pattern period on the surface must match the lamellar period. The difference in the interface energy of different compartments of the pattern should increase with increasing film thickness. The pattern period on the surface has a scaling relationship with the chain length, which is the same as that between the lamellar period and the chain length. The lamellar period is also affected by the polydispersity of the symmetric diblock copolymer. The total period is the average of the period of each component multiplied by the weight of its volume ratio. The morphologies of asymmetric diblock copolymers are also affected by the pattern on the surface, especially when the matching period of the asymmetric diblock copolymer is equal to the pattern period, which is approximately equal to the lamellar period of a symmetric diblock copolymer with the same chain length.

show abstract

Lateral Nanopatterns in Thin Diblock Copolymer Films Induced by Selective Solvents

Cited by 52 publications

References 49 publications

Solvent Induced Sphere Development in Symmetric Diblock Copolymer Thin Films

Solvent Induced Sphere Development in Symmetric Diblock Copolymer Thin Films

Scanning Force Microscopy as Applied to Conformational Studies in Macromolecular Research

Morphologies of diblock copolymer confined in a slit with patterned surfaces studied by dissipative particle dynamics

Contact Info

Product

Resources

About