Flexible carbon nanotube Schottky diode and its integrated circuit applications

Lee, Yong-Woo; Jung, Haesun; Choi, Byoung Ho; Yoon, Jinsu; Yoo, Han Bin; Kim, Hyojin; Park, Geon-Hwi; Kim, Dong Myong; Kim, Dae Hwan; Kang, Min-Ho; Choi, Sung-Jin

doi:10.1039/c9ra02855b

Cited by 15 publications

(13 citation statements)

References 33 publications

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“…Compared to other reverse diodes fabricated by conventional bulk materials and other 2D materials reported in the literature, ,− our heterodiode exhibited a higher rectification ratio of several orders of magnitude, as shown in Figure (e). Moreover, under ultralow bias voltage sweeping from −0.4 to 0.4 V (Figure (c)), our heterodiode also meets the requirement of an integrated circuit (IC) that needs a rectification ratio over 10 5 , which is attributed to negligible threshold bias voltage provided by the tunneling platform. In order to describe the performance of the index of the rectifier conversion rate between the on/off state, we calculated the logarithmic slope of output curves ( ) shown in Figure (c).…”

Section: Resultsmentioning

confidence: 85%

Broken-Gap PtS₂/WSe₂ van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse

et al. 2021

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Broken-gap van der Waals (vdW) heterojunctions based on 2D materials are promising structures to fabricate high-speed switching and low-power multifunctional devices thanks to its charge transport versus quantum tunneling mechanism. However, the tunneling current is usually generated under both positive and negative bias voltage, resulting in small rectification and photocurrent on/off ratio. In this paper, we report a broken-gap vdW heterojunction PtS2/WSe2 with a bilateral accumulation region design and a big band offset by utilizing thick PtS2 as an effective carrier-selective contact, which exhibits an ultrahigh reverser rectification ratio approaching 108 and on/off ratio over 108 at room temperature. We also find excellent photodetection properties in such a heterodiode with a large photocurrent on/off ratio over 105 due to its ultralow forward current and a comparable photodetectivity of 3.8 × 1010 Jones. In addition, the response time of such a photodetector reaches 8 μs owing to the photoinduced tunneling mechanism and reduced interface trapping effect. The proposed heterojunction not only demonstrates the high-performance broken-gap heterodiode but also provides in-depth understanding of the tunneling mechanism in the development of future electronic and optoelectronic applications.

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Section: Resultsmentioning

confidence: 85%

Broken-Gap PtS₂/WSe₂ van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse

et al. 2021

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“…Meanwhile, to enhance the applicability in clinical settings especially in resource‐limited environments, handheld pumps can be used for flow generation without external pumping system. [ 30,74,75 ]…”

Section: Resultsmentioning

confidence: 99%

High‐Throughput Separation of Microvesicles from Whole Blood Components Using Viscoelastic Fluid

Nam

Yoon

Jee

et al. 2020

Adv Materials Technologies

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MVs have gained much interest since it was determined that an elevated level of MVs can serve as a useful biomarker for clinical diagnosis of various diseases, including cardiovascular diseases, infectious diseases, and cancer. [9-13] Therefore, development of techniques for submicrometer MV isolation is desirable for quantification and downstream analyses in clinical applications. [14] Traditional methods currently used to isolate MVs include high-speed-or ultracentrifugation and immunoaffinity capture. [15,16] However, the ultracentrifugation process can create artefactual MVs due to the high shear stress exerted on cells and can create a size bias in the MV population. [14] In addition, the lack of a consensus protocol for centrifugation can limit the preparation of MVs. [15,17] Furthermore, the immunoaffinity capture method may negatively affect the integrity of MVs with the MVs losing their functionality after the elution process. [18] These limitations cause a need for the development of label-free techniques that would enable isolation of intact MPs without the use of high-speed centrifugation. According to recent studies, various lab-on-a-chip techniques based on microfluidics have been used for separating submicrometer MVs, such as filtration, [19] immunocapture, [20] inertial microfluidics, [18,21] deterministic lateral displacement, [22] and acoustic field. [14,23,24] Recently, viscoelastic non-Newtonian microfluidics has achieved considerable attention owing to intrinsic nonlinear elastic forces in pressure-driven flows of polymer solutions. [25,26] The nonuniform distribution of the first normal stress difference (N 1) can drive the suspended particles/ cells laterally depending on the size differences. This technique has been applied to particle/cell focusing [27-30] and size-based particle/cell separation. [31-36] Recently, to replace the conventional centrifugation method, blood plasma extraction using Dean-flow-coupled viscoelastic effect was demonstrated, [37] in which red blood cells (RBCs), white blood cells (WBCs), and even platelets were filtered for high purity (99.99%) plasma extraction. However, the throughput of the device was limited to 50 µL min −1 and nanosized particles in blood plasma had not been analyzed. Viscoelastic microfluidics has been relatively less used in the smaller particle size regime, such as submicrometer EVs, due to small elastic forces. More recently, viscoelastic size-dependent separation of exosomes from other EVs was demonstrated. [38] The exosomes were separated from Cell-derived microvesicles (MVs, also known as microparticles, MPs) are known as important biomarkers of various diseases including cardiovascular diseases, infectious diseases, and cancer. Development of techniques for blood cell removal and MV isolation is required for downstream analyses in biological and clinical applications. A sheathless, label-free, viscoelastic microfluidic device is proposed for the separation of submicrometer plateletderived MPs (PDMPs) from whole blood. Flow rate and cha...

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“…To-this-date, etching processes with oxygen plasma and ozone combined with a lithographic technique have often been used for the implementation of the CNT device array. [39,40] However, the production throughput of these techniques is not high, and the contamination of CNTs by the photoresist causes low conductivity. These responses are unsuitable for the proper operation of the THz sensor array.…”

Section: Free-standing Cnt Film Array Patch Formed Via the Self-alignmentioning

confidence: 99%

A Terahertz Video Camera Patch Sheet with an Adjustable Design based on Self‐Aligned, 2D, Suspended Sensor Array Patterning

Suzuki

Ishibashi

et al. 2021

Adv Funct Materials

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Terahertz (THz) imaging is expected to become powerful tools for nondestructive inspections. To ensure the practical use of THz non-destructive monitoring, versatile THz imagers with adjustable designs that can eliminate the complexities and the bulkiness of the device are urgently required. Herein, a self-aligned filtration process for a 2D, free-standing carbon nanotube film array and its application to a THz video camera patch are reported. The presented techniques enable a) to freely design the camera size, sensor array pattern, and suspended shape according to its applications, b) to cut the camera patch into desired shapes, and c) to attach them to the objects that are intended to be measured. Real-time, non-destructive monitoring of various infrastructures is demonstrated. These results indicate that it can function regardless of restrictions, such as the shapes and locations of the measurement samples, thus providing a strong possibility for use in future non-destructive sensor networks.

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Flexible carbon nanotube Schottky diode and its integrated circuit applications

Cited by 15 publications

References 33 publications

Broken-Gap PtS₂/WSe₂ van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse

Broken-Gap PtS₂/WSe₂ van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse

High‐Throughput Separation of Microvesicles from Whole Blood Components Using Viscoelastic Fluid

A Terahertz Video Camera Patch Sheet with an Adjustable Design based on Self‐Aligned, 2D, Suspended Sensor Array Patterning

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Flexible carbon nanotube Schottky diode and its integrated circuit applications

Cited by 15 publications

References 33 publications

Broken-Gap PtS2/WSe2 van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse

Broken-Gap PtS2/WSe2 van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse

High‐Throughput Separation of Microvesicles from Whole Blood Components Using Viscoelastic Fluid

A Terahertz Video Camera Patch Sheet with an Adjustable Design based on Self‐Aligned, 2D, Suspended Sensor Array Patterning

Contact Info

Product

Resources

About

Broken-Gap PtS₂/WSe₂ van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse

Broken-Gap PtS₂/WSe₂ van der Waals Heterojunction with Ultrahigh Reverse Rectification and Fast Photoresponse