Tsinghua University

Industrial Technology Research Institute

Rong-Ming Ho

Han-Yu Hsueh

Yu-Chueh Hung

Hsiao-Fang Wang

Hsi-Hsin Shih

Shangjr Gwo

Bao-Tsan Ko

Hung-Ying Chen

Yi-Chun Ling

Yeo-Wan Chiang

Lung-Yu Chang Chien

Ming-Shiuan She

Yi-Chun Chen

Wen-Hsien Tseng

Joung-Yei Chen

Hui-Wen Fan

Yu-Cheng Chien

Chu-Chien Lin

Bor-Hunn Huang

Chu-Chieh Lin

Mohan Raj Krishnan

Tsai-Ming Chung

Jassy S J Wang

Zhi-Hong Xie

Chih-Ying Yang

Po-Ting Chiu

Ishan Prasad

Jing-Cherng Tsai

Jing-Yu Lee

Suhail Kizhakkeveettil Siddique

Hiroshi Jinnai

Edwin L Thomas

A nanonetwork with controlled chirality prepared via self-assembly of triblock terpolymers, wherein each of the triblock terpolymers includes a first block, a second block and a third block. The first block is connected to the second block, and the third block is connected to the second block. The first block, the second block and the third block are incompatible. The third block has a homochiral characteristic, and a chirality of the nanonetwork with controlled chirality is determined by the homochiral characteristic.

Nanonetwork with controlled chirality and manufacturing method thereof

A method for fabricating nanoporous polymer thin film includes steps as follows. A polymer thin film is provided, wherein a polymer solution including a polymer is coated on a substrate to form the polymer thin film. A swelling and annealing process is provided, wherein the polymer thin film is disposed inside a chamber with a vapor of a first solvent, the polymer thin film is swollen and annealed to form a swollen polymer thin film, and the swollen polymer thin film includes the polymer and the first solvent. A freezing process is provided, wherein the swollen polymer thin film is cooled to a temperature less than or equal to a crystallization temperature of the first solvent to crystallize the first solvent. A first solvent removing process is provided, wherein the first solvent is removed with a second solvent, such that a nanoporous polymer thin film is obtained.

Method for fabricating nanoporous polymer thin film and corresponding method for fabricating nanoporous thin film

An embodiment of this invention discloses a method for producing a network texture and the method comprises the steps of: formation of a porous structure as a template (matrix); formation of two coherent, independent, and separated robust continuous network structures within the matrix by using the matrix as the template; softening or removing the matrix to shift the two continuous network structures, leading to a novel network texture comprising two incoherent continuous network structures.

Networks and method for producing the same

Nanoporous polymers with gyroid nanochannels can be fabricated from the self-assembly of degradable block copolymer, polystyrene-b-poly(-lactide) (PS-PLLA), followed by the hydrolysis of PLLA blocks. A well-defined nanohybrid material with SiOgyroid nanostructure in a PS matrix can be obtained using the nanoporous PS as a template for the sol-gel reaction. After subsequent UV degradation of the PS matrix, a highly porous inorganic gyroid network remains, yielding a single-component material with an exceptionally low refractive index (as low as 1.1).

Antireflection structures with an exceptional low refractive index and devices containing the same

Nanoporous polymers with gyroid nanochannels can be fabricated from the self-assembly of degradable block copolymer, polystyrene-b-poly(L-lactide) (PS-PLLA), followed by the hydrolysis of PLLA blocks. A well-defined nanohybrid material with SiOgyroid nanostructure in a PS matrix can be obtained using the nanoporous PS as a template for the sol-gel reaction. After subsequent UV degradation of the PS matrix, a highly porous inorganic gyroid network remains, yielding a single-component material with an exceptionally low refractive index (as low as 1.1).

A nanopatterned template for use in manufacturing nanoscale objects. The nanopatterned template contains a nanoporous thin film with a periodically ordered porous geomorphology which is made from a process comprising the steps of: (a) using a block copolymerization process to prepare a block copolymer comprising first and second polymer blocks, the first and second polymer blocks being incompatible with each other; (b) forming a thin film under conditions such that the first polymer blocks form into a periodically ordered topology; and (c) selectively degrading the first polymer blocks to cause the thin film to become a nanoporous material with a periodically ordered porous geomorphology. In a preferred embodiment, the block copolymer is poly(styrene)-poly(L-lactide) (PS-PLLA) chiral block copolymer, the first polymer is poly(L-lactide), and the second polymer is polystyrene. Experimental results show that the first polymer blocks can be formed into a hexagonal cylindrical geomorphology with its axis perpendicular to a surface of the thin film. After hydrolysis to selectively degrade the first polymer blocks, a thin film having a series of repeated nanoscale hexagonal-cylindrical channels is obtained.

Nanopatterned templates from oriented degradable diblock copolymer thin films

A method for making a series of nanoscale microstructures, including helical microstructures and cylindrical microstrustures. This method includes the steps of: (1) forming a chiral block copolymer containing a plurality of chiral first polymer blocks and a second polymer blocks wherein the chiral first polymer blocks have a volume fraction ranging from 20 to 49%; (2) causing a phase separation in the chiral block copolymer. In a preferred embodiment, the chiral block copolymer is poly(styrene)-poly(L-lactide) (PS-PLLA) chiral block copolymer, and the copolymerization process is a living copolymerization process which includes the following steps: (a) mixing styrene with BPO and 4-OH-TEMPO to form 4-hydroxy-TEMPO-terminated polystyrene; and (2) mixing the 4-hydroxy-TEMPO-terminated polystyrene with [&#x3b7;-EDBP)Li][(&#x3b7;-Bu)Li(0.5EtO)]and L-lactide in an organic solvent preferably CHClto form the poly(styrene)-poly(L-lactide) chiral block copolymer. Transmission electron microscopy (TEM) and small X-ray scattering (SAXS) studies show that when the volume fraction of poly(L-lactide) is about 35&#x2013;37%, nanoscale helices with a pitch of 43.8 nanometers and a diameter of 34.4 nanometers were observed.

Nanoscale helical microstructures and channels from chiral poly(L-lactide) block containing block copolymers

Growing community of inventors

Hsinchu, Taiwan

Rong-Ming Ho