Abstract: The present disclosure relates to a 2-dimensional polymer nanosheet, a device including the nanosheet and a method of morphologically tunable preparing the nanosheet. Two-dimensional (2D) polymer nanosheets have been attracting immense attention owing to their potential applications in optical devices, membranes, and catalysis. A new crystalline polyacetylene is described that contains fluorenes and triisopropylsilyl side chains, which could self-assemble into sharp-edged 5-nm-thick square nanosheets with a narrow length dispersity of 1.01, by simple heating and aging in dichloromethane (DCM). The addition of tetrahydrofuran (THF) or chloroform to the heated polymer solution in DCM changed the morphology from square to rectangle. The aspect ratios increased linearly, from 1.0 to 10.6, according to the amount of THF or chloroform added, while maintaining narrow length dispersities less than 1.06.

Abstract: Semi-conducting two-dimensional (2D) nanoobjects, prepared by self-assembly of conjugated polymers, are promising materials for optoelectronic applications. However, there has been no example of 2D nanosheets with controlled lengths and aspect ratios at the same time via self-assembly. Herein, the inventors successfully prepared uniform semi-conducting 2D sheets using a conjugated poly(cyclopentenylene vinylene) homopolymer and its block copolymer by blending and heating. Using these as 2D seeds, living crystallization-driven self-assembly (CDSA) was achieved by adding the homopolymer as a unimer. Interestingly, unlike typical 2D CDSA examples showing radial growth, this homopolymer assembled only in one direction. Owing to this uniaxial growth, the lengths of the 2D nanosheets could be precisely tuned with narrow dispersity according to the unimer-to-seed ratio. The inventors also studied the growth kinetics of the living 2D CDSA and confirmed first-order kinetics.

Abstract: Semi-conducting two-dimensional (2D) nanoobjects, prepared by self-assembly of conjugated polymers, are promising materials for optoelectronic applications. However, there has been no example of 2D nanosheets with controlled lengths and aspect ratios at the same time via self-assembly. Herein, the inventors successfully prepared uniform semi-conducting 2D sheets using a conjugated poly(cyclopentenylene vinylene) homopolymer and its block copolymer by blending and heating. Using these as 2D seeds, living crystallization-driven self-assembly (CDSA) was achieved by adding the homopolymer as a unimer. Interestingly, unlike typical 2D CDSA examples showing radial growth, this homopolymer assembled only in one direction. Owing to this uniaxial growth, the lengths of the 2D nanosheets could be precisely tuned with narrow dispersity according to the unimer-to-seed ratio. The inventors also studied the growth kinetics of the living 2D CDSA and confirmed first-order kinetics.

Abstract: The present disclosure relates to a 2-dimensional polymer nanosheet, a device including the nanosheet and a method of morphologically tunable preparing the nanosheet. Two-dimensional (2D) polymer nanosheets have been attracting immense attention owing to their potential applications in optical devices, membranes, and catalysis. A new crystalline polyacetylene is described that contains fluorenes and triisopropylsilyl side chains, which could self-assemble into sharp-edged 5-nm-thick square nanosheets with a narrow length dispersity of 1.01, by simple heating and aging in dichloromethane (DCM). The addition of tetrahydrofuran (THF) or chloroform to the heated polymer solution in DCM changed the morphology from square to rectangle. The aspect ratios increased linearly, from 1.0 to 10.6, according to the amount of THF or chloroform added, while maintaining narrow length dispersities less than 1.06.

Abstract: A semiconductor wafer transfer apparatus includes a wafer supporting block to support a semiconductor wafer, a casing which is formed along a moving path of the wafer supporting block and having a guiding slot through which a part of the wafer supporting block passes, a driving part which is accommodated in the casing and moves the wafer supporting block, a connection part which connects the driving part with the wafer supporting block, and a shield part which shields the driving part from the guide slot. Accordingly, dust and particles generated inside the casing is effectively prevented from leaking out through the guide slot.

Abstract: A semiconductor wafer transfer apparatus includes a wafer supporting block to support a semiconductor wafer, a casing which is formed along a moving path of the wafer supporting block and having a guiding slot through which a part of the wafer supporting block passes, a driving part which is accommodated in the casing and moves the wafer supporting block, a connection part which connects the driving part with the wafer supporting block, and a shield part which shields the driving part from the guide slot. Accordingly, dust and particles generated inside the casing is effectively prevented from leaking out through the guide slot.

Abstract: A semiconductor wafer processing system having a multi-layered arrangement of wafer processing units included in a spinner to carry out photoresist coating and developing processes for the formation of micro patterns on semiconductor wafers, thereby enabling an easy increase in those processing units coping with an introduction of new processes without increasing the occupying space of the processing units, while being capable of achieving accurate wafer feeding and loading operations, and minimizing the consumption of a chemical solvent coated over wafers. The system includes groups of modules each being selected from first and second modules. The first module includes a plurality of bake units each having bake boxes arranged in a multi-layered fashion, the bake units being arranged adjacent to one another in the wafer feeding direction, and a spin unit, such as a spine coater or a spine developer, fixedly mounted on the bake units.