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公开(公告)号：US12007405B2
公开(公告)日：2024-06-11
申请号：US17055687
申请日：2019-06-04
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Kosuke Minami , Genki Yoshikawa , Gaku Imamura , Kota Shiba
Abstract: Provided is a novel material analysis technique using a chemical sensor. By reversing the conventional approach, a material to be measured is provided as a receptor of the chemical sensor, and a response signal of the chemical sensor obtained by supplying a known gas or the like to the chemical sensor is obtained. From the response signal, it is possible to identify and distinguish the receptor material, and to obtain its composition and the like. By analyzing the response signal by means of a statistical or machine learning technique such as principal component analysis, linear discriminant analysis, or a support vector machine, the above-mentioned identification and the like can be performed with high accuracy.
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2.发明授权公开(公告)号：US11774346B2
公开(公告)日：2023-10-03
申请号：US17057747
申请日：2019-06-04
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Kosuke Minami , Gaku Imamura , Kota Shiba , Genki Yoshikawa
Abstract: In an analysis of a fluid component using a nanomechanical sensor covered with a receptor, the same receptor is caused to express different response characteristics. In a measuring system of analyzing a response when a sample gas and a purge gas are supplied to a nanomechanical sensor while switching the sample gas and the purge gas, a gas (external gas) different from both gases is mixed into a gas channel and supplied to the sensor for measurement. Since a response characteristic of a receptor is modulated by mixing of the external gas, the object described above is achieved.
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公开(公告)号：US11442051B2
公开(公告)日：2022-09-13
申请号：US16488866
申请日：2018-02-16
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Gaku Imamura , Genki Yoshikawa , Takashi Washio
Abstract: Provided is a novel analysis method which, when a chemical sensor is used to perform a measurement, makes it possible to identify a sample without controlling or monitoring a change in the time the sample is introduced. According to the present invention, a sample can be identified without knowing a change in the time the sample is introduced, by using a chemical sensor having a plurality of channels each having different characteristics to perform a measurement, and performing an analysis on the basis of responses obtained from each channel.
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公开(公告)号：US20200075134A1
公开(公告)日：2020-03-05
申请号：US16463867
申请日：2017-11-21
Applicant: National Institute for Materials Science
Inventor： Kota Shiba , Ryo Tamura , Gaku Imamura , Genki Yoshikawa
Abstract: The present invention provides a method and a device for estimating a value to be estimated associated with a specimen, by performing machine learning of a relationship between a value of an estimation object and an output corresponding thereto, based on an output from a chemical sensor with regard to a plurality of specimens for which specific values to be estimated are known, and using the result of the mechanical learning to estimate a specific value to be estimated on the basis of an output from the chemical sensor with regard to a given unknown specimen.
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公开(公告)号：US20140352447A1
公开(公告)日：2014-12-04
申请号：US14371596
申请日：2013-04-17
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Genki Yoshikawa , Masakazu Aono , Tomonobu Nakayama , Frederic Loizeau , Terunobu Akiyama , Sebastian Gautsch , Peter Vettiger
IPC: G01L1/18
CPC classification number: G01L1/18 , G01L1/183 , G01N29/022 , G01N29/036 , G01N2291/0256 , G01N2291/02827
Abstract: A double-side-coated surface stress sensor includes a sensing membrane structure portion where at least two ends opposite each other are fixed on a mounting portion; a receptor layer that coats both surfaces of the sensing membrane structure portion; and an element detecting a stress, which is provided in the vicinity of at least one of the fixed two ends, opposite each other, of the sensing membrane structure portion or at least one of the fixed two ends, opposite each other, of the mounting portion, in which in a detection output is obtained from the element based on the stress which is applied onto the receptor layer coating the both surfaces of the sensing membrane structure portion. Accordingly, it is possible to provide a double-side-coated surface stress sensor which coats both surfaces of the sensing membrane structure portion by the receptor layer, thereby obtaining a sufficiently large detection output.
Abstract translation: 双面涂布表面应力传感器包括传感膜结构部分，其中彼此相对的至少两个端部固定在安装部分上; 覆盖感测膜结构部分的两个表面的受体层; 以及检测应力的元件，其设置在感测膜结构部分的彼此相对的固定的两个端部中的至少一个附近，或彼此相对的固定的两个端部中的至少一个 部分，其中根据施加到涂覆在感测膜结构部分的两个表面上的受体层上的应力，从元件获得检测输出。 因此，可以提供通过受体层涂覆感测膜结构部分的两个表面的双面涂覆的表面应力传感器，从而获得足够大的检测输出。
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Patent Agency Ranking
公开(公告)号：US12130270B2
公开(公告)日：2024-10-29
申请号：US17619024
申请日：2020-05-08
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Gaku Imamura , Kosuke Minami , Kota Shiba , Genki Yoshikawa
IPC: G01N33/00 , C08F222/06 , G01L1/18 , G01N5/02 , G01N29/02
CPC classification number: G01N33/0054 , C08F222/06 , G01L1/18 , G01N5/02 , G01N29/022 , G01N2291/0256
Abstract: An object of the present invention is to detect ammonia with high sensitivity and high selectivity using a nanomechanical sensor with a structure that is as simple as possible. A method for detecting ammonia according to an embodiment of the present invention comprises supplying a sample gas possibly containing ammonia to a nanomechanical sensor that detects a stress or a displacement using poly(methyl vinyl ether-alt-maleic anhydride) as a material of a receptor layer, and detecting presence or absence of ammonia or a content of ammonia in the sample gas based on an output signal from the nanomechanical sensor, in which the sample gas is a humidified sample gas with controlled relative humidity.
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公开(公告)号：US12078627B2
公开(公告)日：2024-09-03
申请号：US17627421
申请日：2020-06-17
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Genki Yoshikawa , Takahiro Nemoto , Masaaki Matoba , Kosuke Minami
CPC classification number: G01N33/0036 , G01N1/38 , G01N2001/381
Abstract: The present invention suppresses an adverse effect caused when an additional gas such as water vapor is mixed in a sample gas or the like that is subjected to gas measurement. In an embodiment of the present invention, in gas measurement for analyzing sensor output signals obtained by alternately supplying a sample gas and a reference gas to a sensor element while alternately switching between the sample gas and the reference gas, the sample gas and the reference gas pass through a humidity equilibration device partitioned by a water vapor permeable membrane, and then are supplied to the sensor element. As a result, since both gases have substantially the same value of humidity at the time of being supplied to the sensor element, influences of water vapor are substantially cancelled out in signals output from the sensor element by the alternate supply of the sample gas and the reference gas.
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公开(公告)号：US10564082B2
公开(公告)日：2020-02-18
申请号：US15543298
申请日：2015-08-31
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Kota Shiba , Genki Yoshikawa , Yusuke Yamauchi , Norihiro Suzuki , Gaku Imamura , Kosuke Minami , Hamish Hei-Man Yeung
Abstract: According to improvement of the receptor layer of various sensors of the type for detecting physical parameters (for example, a surface stress sensor, QCM, and SPR), all of high sensitivity, selectivity, and durability are achieved simultaneously. A porous material or a particulate material, e.g., nanoparticles, is used in place of a uniform membrane which has been conventionally used as a receptor layer. Accordingly, the sensitivity can be controlled by changing the membrane thickness of the receptor layer, the selectivity can be controlled by changing a surface modifying group to be fixed on the porous material or particulate material, and the durability can be controlled by changing the composition and surface properties of the porous material or particulate material.
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公开(公告)号：US10458939B2
公开(公告)日：2019-10-29
申请号：US15552949
申请日：2016-02-25
Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
Inventor： Kota Shiba , Genki Yoshikawa , Gaku Imamura
IPC: G01N27/12 , G01N5/02 , G01N29/02 , G01N29/036 , G01N3/00 , G01N21/00 , B82Y15/00 , G01N9/00 , G01N11/16
Abstract: As a receptor layer, a film of a composite material of a base material such as a polymer and particles that adsorb an analyte is used. When the present invention is applied to a surface stress sensor or the like, the Young's modulus of the receptor layer, which significantly affects detection sensitivity, can be preset with a high degree of freedom, by independently selecting particles that adsorb a desired analyte and a base material that disperses said particles therein.
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10.发明申请公开(公告)号：US20190317066A1
公开(公告)日：2019-10-17
申请号：US16463585
申请日：2017-11-22
Applicant: National Institute for Materials Science
Inventor： Gaku Imamura , Genki Yoshikawa , Takashi Washio
Abstract: Provided is a novel analysis method that enables identification of a sample even when any sample is introduced during measurement carried out by using a chemical sensor. An input in which the amount of an unknown sample changes over time is provided to the chemical sensor, a response which is from the chemical sensor and which changes over time is measured, a sensor function (transmission function) of the chemical sensor with respect to the unknown sample is calculated on the basis of the input and the response, and the unknown sample is identified on the basis of the sensor function of the chemical sensor with respect to the unknown sample.
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