By Northwestern University - NUANCE Center
The LabRAM system is a state-of-the-art Raman spectroscopy platform, enhanced with Tip-Enhanced Raman Spectroscopy (TERS) capabilities. This system offers advanced 2D and 3D confocal imaging, spectral analysis, and nanoscale characterization. With multi-laser capabilities, full automation, ultra-low-frequency filters, and true confocal imaging, it is designed to meet the rigorous demands of cutting-edge research in materials science, nanotechnology, and life sciences. Key Capabilities Multi-Laser Capability - Supports multiple wavelengths: 473 nm, 532 nm, 633 nm, and 785 nm. - Covers Visible to near-IR spectral regions. - Features direct laser coupling and automated laser switching for seamless operation. Ultra-Low-Frequency Filters - Equipped with advanced ultra-low-frequency filters, enabling Raman spectroscopy down to 5 wavenumbers. - Ideal for studying low-energy phonon modes, lattice vibrations, and phase transitions in crystalline and molecular systems. True Confocal Microscope - Provides high spatial resolution imaging. - Equipped with automated mapping stages and full microscope visualization optics. - Delivers precise and accurate Raman and photoluminescence (PL) measurements. High-Performance Raman Spectrometer - Offers ultimate spectral resolution with multiple gratings and automated switching. - Enables wide spectral range analysis for both Raman and PL. - Fully automated system design enhances efficiency and ease of use. Ultrafast Confocal Imaging - DuoScan Imaging Technology: Utilizes high-precision, ultra-fast rastering mirrors for: - Generating variable-sized laser macro-spots. - Achieving nano-step mapping from deep UV to NIR. - SWIFT Module: Synchronizes high optical throughput with optimized detector-stage coordination, enabling: - High-resolution confocal Raman mapping in seconds, even at macro scales. Integration with TERS (Tip-Enhanced Raman Spectroscopy) The integration of TERS extends the LabRAM system's capabilities to achieve molecular-level spatial resolution. By combining scanning probe microscopy (SPM) with Raman spectroscopy, TERS dramatically enhances Raman signal sensitivity and spatial resolution. Enhanced Features with TERS - Photoconducting AFM: Enables nanoscale electrical characterization by mapping local photoresponses, critical for photovoltaic and optoelectronic research. - Electrical AFM: Provides high-resolution mapping of electrical properties, ideal for studying semiconductors, conductive materials, and electronic devices. Advantages of TERS - Nanoscale Resolution: Resolves structures below the diffraction limit, achieving molecular and atomic-level spatial resolution. - Enhanced Signal Sensitivity: Amplifies Raman signals through localized surface plasmon resonances at the metallic tip. - Correlated Imaging: Simultaneously provides topographic, electrical, and chemical mapping for comprehensive material analysis. Surface and Interface Analysis: Optimized for studying thin films, nanostructures, and biological samples. Applications With TERS, ultra-low-frequency filters, and advanced AFM capabilities, the LabRAM system excels in: - Nanomaterial characterization (e.g., 2D materials, nanostructures). - Studying low-frequency vibrational modes for crystal and molecular analysis. - Photovoltaic and optoelectronic material analysis with photoconducting AFM. - Electrical property mapping of semiconductors and conductive polymers with electrical AFM. - Surface-enhanced Raman scattering (SERS) and ultra-sensitive biological studies. - Simultaneous chemical, electrical, and topographic analysis for semiconductor defect analysis and device optimization. The combination of TERS capabilities, ultra-low-frequency filters, and photoconducting and electrical AFM functionalities makes the LabRAM system a versatile, comprehensive platform for nanoscale research, offering unparalleled precision and sensitivity across a wide range of scientific applications.
