A Nano‐Stripe Based Sensor for Temperature Measurement at the Submicrometer and Nano Scales

Huo, Xiaoye; Liu, Haixiao; Liang, Yiran; Fu, Mengqi; Sun, Wei; Chen, Qing; Xu, Shengyong

doi:10.1002/smll.201303942

Cited by 28 publications

(38 citation statements)

References 24 publications

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“…This phenomenon was found following a brief power law of w − α , where w was the stripe width and α was a number close to one [41]. Since the length of 30–50 μm is two orders of magnitude larger than the mean free paths of the ordinary bulk metals tested in these studies, the results raised arguments [44,45].…”

Section: Introductionmentioning

confidence: 92%

“…Recently, for the metallic thin film stripes of more than ten metals, such as Ni, Cr, Ti, Ta, Pd, and W, it was reported that, when the film thickness was kept at 80–100 nm, but the stripe width was changed from 100 micron to 30–50 μm, the thermopower of these stripes continuously showed measurable changes, and the size effect was enhanced when the stripe width was further reduced, all the way to 80 nm [19,40,41,42,43]. This phenomenon was found following a brief power law of w − α , where w was the stripe width and α was a number close to one [41].…”

Section: Introductionmentioning

confidence: 99%

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Geometric Shape Induced Small Change of Seebeck Coefficient in Bulky Metallic Wires

Yang

et al. 2017

Sensors

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In this paper, we report the results of slight changes in the thermopower of long W, Mo, Zn, Cu, brass, and Ti wires, that resulted from changes in the wire’s diameter or cross-sectional area. The samples used in the tests had a round shape with a diameter that ranged from tens of micron to 2 mm, which was much larger than the corresponding mean free paths of these materials. Nevertheless, a small change in thermopower, at the order of 1–10 nV/K, was repeatedly observed when the wire diameter was changed, or when the cross-sectional area of the wire was altered by mechanical methods, such as grinding or splitting. The results are consistent with previous observations showing that the thermopower in metallic thin film stripes changes with their width, from 100 μm to as little as 70 nm, implying a universal, geometric-boundary-related size effect of thermopower in metal materials, that occurs at the nanometer scale and continuously decreases all the way to the millimeter scale. This effect could be applied in the manufacturing of high-temperature sensors with simple structures.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Geometric Shape Induced Small Change of Seebeck Coefficient in Bulky Metallic Wires

Yang

et al. 2017

Sensors

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“…Controlled freezing on the chip offers better survival (74% and 38% at holding temperatures of −25 °C and −40 °C, respectively) compared with direct freezing with liquid nitrogen vapor (27%). Likely a more accurate temperature sensor, such as the recently reported submicrometer and nano scale sensors (Huo et al, 2014), and feedback control on the microheaters, can improve cell survival (Li et al, 2010). …”

Section: Cooling and Warming: Programmable Freezing And Vitrificationmentioning

confidence: 99%

Microfluidics for cryopreservation

Zhao

2017

Biotechnology Advances

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Cryopreservation has utility in clinical and scientific research but implementation is highly complex and includes labor-intensive cell-specific protocols for the addition/removal of cryoprotective agents and freeze-thaw cycles. Microfluidic platforms can revolutionize cryopreservation by providing new tools to manipulate and screen cells at micro/nano scales, which are presently difficult or impossible with conventional bulk approaches. This review describes applications of microfluidic chips in cell manipulation, cryoprotective agent exposure, programmed freezing/thawing, vitrification, and in situ assessment in cryopreservation, and discusses achievements and challenges, providing perspectives for future development.

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“…1,2 In this regard, accurate determination of temperature in the nano/micro scale regime, especially in microelectronic circuits, living cells, etc., [3][4][5][6][7][8] is essential to use noncontact optical based thermometers, which have its own advantages over conventional temperature measuring devices due to its noninvasive operations and inertness to various environment such as electrical or magnetic field or other harsh environments in the desired circumstances. [9][10][11] Among various optical thermometers, temperature induced change in different fluorescence parameters such as emission intensity, fluorescent intensity ratio (FIR), peak position, peak width, life time, etc.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh-sensitive optical temperature sensing based on quasi-thermalized green emissions from Er:ZnO

Senapati

2017

Phys. Chem. Chem. Phys.

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Fluorescence intensity ratio (FIR) based optical temperature sensors employ the variation of intensity ratio between two peaks, which are very close to each other. Here, we prepare Er doped ZnO microrods by a hydrothermal route and exploit them for FIR based temperature sensing. The Er:ZnO shows the band-to-band UV emission and broad defect emissions with small Er related peaks upon excitation with a 355 nm laser, while only peaks corresponding to Er transitions are observed with 532 nm laser excitation. The green emissions (H → I, S → I) under 532 nm excitation are considered for temperature sensing performance as they possess a quasi-thermal equilibrium between them and the variation of intensity ratio with temperature follows a Boltzmann type distribution. The sensitivity obtained here is very high (3445/T K) compared to the reported Er ion based temperature sensors and can be applied in a wide range of temperature (83-493 K). The value of sensitivity is found to be almost independent of the concentration of Er doping and is the highest reported for Er-doped materials.

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A Nano‐Stripe Based Sensor for Temperature Measurement at the Submicrometer and Nano Scales

Cited by 28 publications

References 24 publications

Geometric Shape Induced Small Change of Seebeck Coefficient in Bulky Metallic Wires

Geometric Shape Induced Small Change of Seebeck Coefficient in Bulky Metallic Wires

Microfluidics for cryopreservation

Ultrahigh-sensitive optical temperature sensing based on quasi-thermalized green emissions from Er:ZnO

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