Theβ-Ga_(2)O_(3)films with different thicknesses are prepared by an atomic layer deposition system.The influence of film thickness on the crystal quality is obvious,indicating that the thicker films perform better cr...Theβ-Ga_(2)O_(3)films with different thicknesses are prepared by an atomic layer deposition system.The influence of film thickness on the crystal quality is obvious,indicating that the thicker films perform better crystal quality,which is verified from x-ray diffraction(XRD)and scanning electron microscope(SEM)results.The Ga_(2)O_(3)-based solar blind photodetectors with different thicknesses are fabricated and studied.The experimental results show that the responsivity of the photodetectors increases exponentially with the increase of the film thickness.The photodetectors with inter-fingered structure based on 900 growth cyclesβ-Ga_(2)O_(3)active layers(corresponding film thickness of 58 nm)exhibit the best performances including a low dark current of 134 fA,photo-to-dark current ratio of 1.5×10^(7),photoresponsivity of 1.56 A/W,detectivity of 2.77×10^(14)Jones,and external quantum efficiency of 764.49%at a bias voltage of 10 V under 254-nm DUV illumination.The photoresponse rejection ratio(R_(254)/R_(365))is up to 1.86×10^(5).In addition,we find that the photoelectric characteristics also depend on the finger spacing of the MSM structure.As the finger spacing decreases from 50μm to10μW,the photoresponsivity,detectivity,and external quantum efficiency increase significantly.展开更多
BACKGROUND Extraskeletal osteosarcoma(ESOS)is a highly malignant osteosarcoma that occurs in extraskeletal tissues.It often affects the soft tissues of the limbs.ESOS is classified as primary or secondary.Here,we repo...BACKGROUND Extraskeletal osteosarcoma(ESOS)is a highly malignant osteosarcoma that occurs in extraskeletal tissues.It often affects the soft tissues of the limbs.ESOS is classified as primary or secondary.Here,we report a case of primary hepatic osteosarcoma in a 76-year-old male patient,which is very rare.CASE SUMMARY Here,we report a case of primary hepatic osteosarcoma in a 76-year-old male patient.The patient had a giant cystic-solid mass in the right hepatic lobe that was evident on ultrasound and computed tomography.Postoperative pathology and immunohistochemistry of the mass,which was surgically removed,suggested fibroblastic osteosarcoma.Hepatic osteosarcoma reoccurred 48 d after surgery,resulting in significant compression and narrowing of the hepatic segment of the inferior vena cava.Consequently,the patient underwent stent implantation in the inferior vena cava and transcatheter arterial chemoembolization.Unfortunately,the patient died of multiple organ failure postoperatively.CONCLUSION ESOS is a rare mesenchymal tumor with a short course and a high likelihood of metastasis and recurrence.The combination of surgical resection and chemotherapy may be the best treatment.展开更多
基金Project supported by the Natural Science Basic Research Program of Shaanxi Province,China(Grant No.2022JQ-701)the Scientific Research Program Funded by Shaanxi Provincial Education Department,China(Grant No.21JK0919)。
文摘Theβ-Ga_(2)O_(3)films with different thicknesses are prepared by an atomic layer deposition system.The influence of film thickness on the crystal quality is obvious,indicating that the thicker films perform better crystal quality,which is verified from x-ray diffraction(XRD)and scanning electron microscope(SEM)results.The Ga_(2)O_(3)-based solar blind photodetectors with different thicknesses are fabricated and studied.The experimental results show that the responsivity of the photodetectors increases exponentially with the increase of the film thickness.The photodetectors with inter-fingered structure based on 900 growth cyclesβ-Ga_(2)O_(3)active layers(corresponding film thickness of 58 nm)exhibit the best performances including a low dark current of 134 fA,photo-to-dark current ratio of 1.5×10^(7),photoresponsivity of 1.56 A/W,detectivity of 2.77×10^(14)Jones,and external quantum efficiency of 764.49%at a bias voltage of 10 V under 254-nm DUV illumination.The photoresponse rejection ratio(R_(254)/R_(365))is up to 1.86×10^(5).In addition,we find that the photoelectric characteristics also depend on the finger spacing of the MSM structure.As the finger spacing decreases from 50μm to10μW,the photoresponsivity,detectivity,and external quantum efficiency increase significantly.
文摘BACKGROUND Extraskeletal osteosarcoma(ESOS)is a highly malignant osteosarcoma that occurs in extraskeletal tissues.It often affects the soft tissues of the limbs.ESOS is classified as primary or secondary.Here,we report a case of primary hepatic osteosarcoma in a 76-year-old male patient,which is very rare.CASE SUMMARY Here,we report a case of primary hepatic osteosarcoma in a 76-year-old male patient.The patient had a giant cystic-solid mass in the right hepatic lobe that was evident on ultrasound and computed tomography.Postoperative pathology and immunohistochemistry of the mass,which was surgically removed,suggested fibroblastic osteosarcoma.Hepatic osteosarcoma reoccurred 48 d after surgery,resulting in significant compression and narrowing of the hepatic segment of the inferior vena cava.Consequently,the patient underwent stent implantation in the inferior vena cava and transcatheter arterial chemoembolization.Unfortunately,the patient died of multiple organ failure postoperatively.CONCLUSION ESOS is a rare mesenchymal tumor with a short course and a high likelihood of metastasis and recurrence.The combination of surgical resection and chemotherapy may be the best treatment.
