1centi m  = 1 / 100 m

1mili m = 1 / 1,000 m

1micro m  = 1 / 1,000,000 m

1nano m  = 1 / 1,000,000,000 m

1pico m  = 1 / 1,000,000,000,000 m



Green Science Alliance Co., Ltd engages in the research, development, and synthesis of metal–organic frameworks, a class of state-of-the-art functional materials with ultra-high porosity. They study a burgeoning subfield of so-called “Pico Technology”, as the pore size(s) of these materials can be tightly controlled with sub-nanometer scale precision. 



Highly porous metal–organic frameworks (MOFs)—also known as porous coordination polymers (PCPs)—are achieved by the self-assembly of metal ions and organic ligands. Their regular, crystalline structure is composed of metal ions (“nodes”) interconnected by a web of organic ligands (“linkers”): the cavities in the resulting framework structure function as a space for the uptake of the molecule(s) of interest. MOFs possess extraordinarily high surface area. 

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It is no exaggeration to say that modern life could not exist in its present form without existing porous materials such as zeolite and activated charcoal, whose applications range from use as catalysts and separators in the petrochemical industry to purification and deodorization of water supplies. These microporous materials tend to perform their intended function reasonably well, whether it be separation, occlusion, adsorption, or release. However, technical limitations in the ability to precisely control pore size have presented obstacles to R&D into more sophisticated and multi-functional materials capable of excellent performance in several of these functions. MOFs offer a new way forward: the ability to precisely customize the ligand bonds in their molecular design allows engineers to create new materials with more complex structures and higher-order functionality. Moreover, the utilization of metal complexes in particular supports the development of new classes of innovative materials, straddling the boundary between organic and inorganic compounds, and complicated structures that would be difficult to synthesize by conventional means.

The ability to alter the specific ligands/metals and their coordination environment makes it possible to fabricate materials with some of the smallest pore sizes (<0.4 nm / 400 pm) and highest specific surface areas (BET surface area: ~6,000 m2/g) to date. In addition, it is theoretically possible to synthesize an incredibly high number of MOFs by using different combinations of metal (elements) and organic ligands: in fact, more than 20,000 have been reported to date.



The MOF applications below are just some of those being explored for these cutting-edge, never-before-seen materials.

Drug delivery systems and other medical usages

Separation, adsorption, and storage of a wide variety of gases and gaseous molecule

Water extraction from deserts and other dry environments

Recovery of hazardous metals and metal ions from wastewater

Solid catalysts

Electrodes and electrolytes in batteries and capacitors


Artificial photosynthesis and photocatalysts

Adsorption and separation of dyes and pigments from solutions



Metal Organic Framework : MOF Porous Coordination Polymer : PCP




Oxide Nanocollids



Green Science Alliance also manufactures a wide variety of hybrid MOF systems, integrating them with quantum dots, colloidal metal nanoparticles, colloidal oxide nanoparticles, and cellulose nanofibers composites. Our ability to produce this wide variety of complex materials by specific combinations of the sub-nanometer-scale materials is enhanced by our tight control over manufacturing processes, as we fabricate all of our materials in house. We pledge to continue our research and development into new challenges using these hybrid techniques into the future.