Abstract:
An embodiment of a method of performing thermoreflectance measurements with an imaging system comprises: reflecting radiation from a number of points in a sample in response to an illuminating radiation while a temperature modulation is applied to the sample; acquiring digital images of the reflected radiation after the reflected radiation passes through an aperture; and deriving a map of relative reflectivity of the sample based on the digital images. At least a portion of the illuminating radiation can pass through at least a portion of the sample and is reflected at a change refractive index interface.
Abstract:
A system and method for evaluating a geological formation including subjecting a source-rock sample from the geological formation to atomic force microscopy (AFM) to determine a thermal property or material property of the source-rock sample. The properties determined may include thermal conductivity or material transition temperature.
Abstract:
The present invention relates to a scanning thermal microscope which scans a specimen at a nanoscale resolution to display thermal characteristics or the like of the specimen in images, and to a method for measuring quantitative temperature and thermal conductivity using the scanning thermal microscope. Particularly, the present invention proposes a scanning thermal microscope and a method for measuring quantitative temperature and thermal conductivity using the scanning thermal microscope, wherein the method comprises: a step of scanning a specimen while a probe of the scanning thermal microscope contacts the specimen, to measure the temperature (that is, a contact mode temperature) of the specimen; a step of scanning the specimen multiple times in accordance with the height of the probe of the scanning thermal microscope from the specimen, to measure the temperature (that is, a contactless mode temperature) of the specimen; a step of calculating an interpolating temperature, in which the height of the probe from the specimen is zero, by an extrapolation from the contactless mode temperature obtained by the multiple scanning operations; and a step of acquiring a local quantitative temperature and thermal conductivity by comparing the contact mode temperature with the interpolating temperature.
Abstract:
본 발명은 나노스케일(nano scale)의 해상력을 가지고 시편을 주사(scanning)하여 시편의 열적 특성 등을 이미지로 나타내는 주사탐침열현미경 및 이를 이용한 정량적 온도 및 열전도도 계측방법에 관한 것이다. 특히 본 발명은 주사탐침열현미경의 탐침이 시편에 접촉된 상태에서 상기 시편을 주사하여 상기 시편의 온도(즉, 접촉모드 온도)을 계측하는 단계와; 상기 주사탐침열현미경의 탐침이 상기 시편으로부터 유격된 높이에 따라서 복수 회 상기 시편을 주사하여 상기 시편의 온도(즉, 비접촉모드 온도)를 계측하는 단계와; 상기 복수 회의 비접촉모드 온도로부터 외삽법에 의해, 상기 유격된 높이가 '0'인 보간 온도를 산출하는 단계와; 상기 접촉모드 온도과 상기 보간 온도의 비교에 의해, 국부 정량적 온도 및 열전도도를 획득하는 단계;를 포함하는 것을 특징으로 하는 주사탐침열현미경 및 이를 이용한 정량적 온도 및 열전도도 계측방법을 제시한다.
Abstract:
A system and method for evaluating a geological formation including subjecting a source-rock sample from the geological formation to atomic force microscopy (AFM) to determine a thermal property or material property of the source-rock sample. The properties determined may include thermal conductivity or material transition temperature.
Abstract:
A device and methods for use thereof in low-temperature thermal scanning microscopy, providing non-contact, non-invasive localized temperature and thermal conductivity measurements in nanometer scale ranges with a temperature resolution in the micro-Kelvin order. A superconductive cap mounted on the tip of an elongated support probe is electrically-connected to superconductive leads for carrying electrical current through the cap. The critical superconducting current of the leads is configured to be greater than the critical current supported by the cap, and the cap's critical current is configured to be a function of its temperature. Thus, the temperature of the cap is measured by measuring its critical superconducting current. In a related embodiment, driving a current greater than the critical current of the cap quenches the cap's superconductivity, and permits the cap to dissipate resistive heat into the sample being scanned. Scanning of the sample in this mode thus images its thermal conductivity patterns.
Abstract:
A thermal probe and method for generating a thermal map (M) of a sample interface (1). A scanning thermal microscope (100) is provided having at least one or more probe tips (11,12). The probe tips (11,12) are scanned at a near-field distance (D1) over the sample interface (1). Heat flux data (H) is recorded as a function of a relative position (X,Y) of the probe tip (11) over the sample interface (1). The thermal map (M) is calculated from the recorded heat flux data (H) based on a spatially resolved heat flux profile (P) of the probe tip (11) at the sample interface (1). The heat flux profile (P) has a local maximum at a lateral distance (R) across the sample interface (1) with respect to an apex (11a) of the probe tip (11).
Abstract:
Thermal probe (10) for a scanning thermal microscope (100), use, and process of manufacturing. The thermal probe (10) comprises a single-material (M1) thermal conducting body (12) consisting of a probe frame (14) ending in a probe tip (11). A bi-material (M1,M2) cantilever strip (13) is connected to the probe frame (14) in thermal communication with the probe tip (11). The cantilever strip (13) in unbended state lies in-plane (X,Z) with the probe tip (11). The cantilever strip (13) comprises layers of material (M1,M2) having different coefficients of thermal expansion configured to bend the cantilever strip (13) with respect to the single-material thermal conducting body (12) as a function of the heat exchange (H) between the probe tip (11) and the microscopic structure (2) for measuring heat exchange (H) with a sample interface (1) by means of measuring the bending of the cantilever strip (13).