MEMS加熱/バイアス用ホルダー
Single-Tilt | Double-Tilt | |
Tilt Range | Up to ± 45° depending on objective pole | Up to ± 20° (alpha and beta) depending on objective pole |
Beta-tilt accuracy | NA | <0.01 degree |
Electrical Contacts | 9* | 9* |
Contact Type | Direct Chip Contact | Direct Chip Contact |
Max Operating Temperature | > 1000°C | > 1000°C |
Settled Resolution at 1000°C | Up to TEM resolution | Up to TEM resolution |
Temperature Stability | + 100 hours | + 100 hours |
Temperature Measurement | 4-point resistance sensing | 4-point resistance sensing |
EELS / EDS Compatible | Yes (full temp range) | Yes (full temp range) |
TEM Compatibility | TFS/FEI, JEOL, Hitachi | TFS/FEI, JEOL, Hitachi |
2次元遷移金属(TM)ダイカルコゲナイドのその場高温加熱による相転移の観察
TMダイカルコゲナイドは、卓越した電子的・光学的特性を示します。ペンシルベニア大学の研究者たちによる2次元MoS2の数層に関する以前の研究では、原子が単層/多層内で配向を占める複数の相が示されました。
今回は同じグループが、薄い2次元ダイカルコゲナイドを研究し、親結晶基板からのユニークな相転移を観察しました。この転移は、試料の温度が約500°Cに達したときに開始されます。新しい相の拡散速度は、試料に加えられた刺激に依存します。
このデータはペンシルバニア大学のPawan Kumar、Eric Stach、Deep Jariwalaから提供されたものです。
EditIn-situ TEM atomic scale diffusion between two quantum dots at high temperatures
The movie on the left shows atomic scale diffusion of atoms between two quantum dots heated to 650°C in-situ in the TEM using Hummingbird Scientific’s MEMS heating + biasing TEM sample holder. Atomic diffusion appears to occur mostly through the bridge between the two particles and continues until the two particles coalesce to form one larger particle.
Data provided by Pawan Kumar, Deep Jariwala and Eric Stach from the University of Pennsylvania.
Edit
Pawan Kumar, James P. Horwath, Alexandre C. Foucher, Christopher C. Price, Natalia Acero, Vivek B. Shenoy, Eric A. Stach, and Deep Jariwala. “Direct visualization of out-of-equilibrium structural transformations in atomically thin chalcogenides,” npj 2D Materials and Applications (2020) | Abstract |
Pawan Kumar, James Horwath, Alexandre Foucher, Christopher Price, Natalia Acero, Vivek Shenoy, Deep Jariwala, Eric Stach, Daan Hein Alsem. “Non-equilibrium Structural Phase Transformations in Atomically Thin Transition Metal Dichalcogenides,” Microscopy & Microanalysis (2020) | Abstract |
Jules Gardener, Austin Akey, Daan Hein Alsem, and David Bell. “Focused Ion Beam Sample Preparation for High Temperature In-situ Transmission Electron Microscope Experiments: Use Carbon for Now,” Microscopy & Microanalysis (2020) | Abstract |
Alexander B. Bard, Matthew B. Lim, Xuezhe Zhou, Julio A. Rodriguez Manzo, Daan Hein Alsem, and Peter J. Pauzauskie. “Observation of Void Formation in Cubic NaYF4 Nanocrystals Using In Situ Heating Transmission Electron Microscopy,” Microscopy & Microanalysis (2019) | Abstract |
Khim Karki, Victoriea L. Bird, Daan Hein Alsem, and Melissa K. Santala. “In Situ TEM Observation of Crystallization in Phase-Change Material,” Microscopy & Microanalysis (2018) | Abstract |
Victoriea L. Bird, Al J. Rise, Khim Karki, Daan Hein Alsem, Geoffrey H. Campbell, and Melissa K. Santala. “Mapping Crystallization Kinetics of Phase-Change Materials Over Large Temperature Ranges Using Complementary In Situ Microscopy Techniques,” Microscopy & Microanalysis (2018) | Abstract |
Daan Hein Alsem, James Horwath, Julio Rodriguez-Manzo, Khim Karki and Eric Stach. “Optimized High-Temperature In-Situ Transmission Electron Microscopy Double-Tilt Sample Heating Platform,” Microscopy & Microanalysis (2019) | |
Daan Hein Alsem, James Horwath, Julio Rodriguez-Manzo, Khim Karki and Eric Stach. “In-Situ Transmission Electron Microscopy Double-Tilt Sample Heating Platform.” Microscience Microscopy Congress (2019) | |
Khim Karki, Victoriea L. Bird, Julio Rodriguez-Manzo, Daan Hein Alsem, Norman Salmon, and Melissa K. Santala. “Direct Observation of Crystallization in Phase-Change Material Using In-Situ TEM,” International Microscopy Congress (2019) | |
Victoriea L. Bird, Al J. Rise, Khim Karki, Daan Hein Alsem, Geoffrey H. Campbell, and Melissa K. Santala. “Measuring Crystal Growth Rates in an Amorphous Ag-In-Sb-Te Phase-Change Material Over Large Temperature Ranges Using In-Situ Microscopy Techniques,” Materials Science and Technology (2018) | |
Xuezhe Zhou, Julio Alejandro Rodriguez Manzo, Matthew Lim, Norman Salmon, and Peter Pauzauskie. “Tracking Thermal Phase Transformations of Luminescence Materials with In-Situ TEM” Materials Research Society (2017) |
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