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SEMTE | Hildreth Lab

Facilities

Facilities

Facilities

Goldwater Center B39 & B43; Engineering Center E103

Hildreth Research Group has 83 m2 (893 ft2) of chemical lab space in the basement of Goldwater Center dedicated to nanoscale to centimeter scale additive manufacturing research.  This lab space includes 4.9 meters (16 feet) of chemical fumehoods, 38.2 meters (126 ft) of bench space, two nitrogen glove boxes, and a 26.8 m2 (288 ft2) class 10,000 mini-cleanroom that houses our custom EHD Nano-drip printer and a Microfab Jetlab II (until it is moved to a glove box). Additionally, we have a 32 m2 (341 ft2) non-chemical lab space in Engineering Center (E-wing) dedicated to a field emission scanning electron microscope (FESEM).

These facilities contain much of the fabrication and metrology equipment necessary to study the chemical kinetics, mass transport, heat transfer, and corrosion phenomena involved in printed reactive inks, dissolvable metal supports, and ultra near-field electrohydrodynamics.

Below lists some of our major fabrication, characterization, and synthesis equipments.

3D Printers

Microfab Jetlab II Precision

Microfab Jetlab II Precision

Drop-on-demand materials printer

Microfab Jetlab II with precision stage, stage mapping calibration, and digital pnuematic controller upgrades.  Print can print up to four inks/materials serially.  Horizonatal cameras and sequenced strope illumaiton for jet setup and vertical camera for alignment and post-print inpsection.  Printer software supports print-on-the-fly and point-to-point print modes. Specifications include heated stages up to 170 ˚C; XY-travel range of 200 mm x 200 mm; velocity/acceleration up to 100 mm/s and 400 mm/s2 respectively; accuracy/repeatbility ±3 µm / ± 1 µm.  Current nozzle sizes in use range from 5 µm to 100 µm in diameter.

NOTE: we are currently moving our Jetlab II into a glove box for printing in inert atmospheres.

EHD Nano-drip Printer

EHD Nano-drip Printer

Lab-built EHD Nano-drop printer

This is a lab-built Electrohydrodynamic (EHD) printer for nanoscale additive manufacturing.  Printer consists of a two 3-axis Newport Stages (macro-stage and piezoelectric nano-stage), integrated Nanosurf AFM, and high speed amplifier capable of +/- 10,000 V with slew rates up to 700 V/µS.

Formlabs Form1+ SLA Printer

Formlabs Form1+ SLA Printer

Stereolithography Printer (SLA) for high resolution printing

Formlabs Form1+ 3D SLA printer with down to 25 µm layer resolution  Supports the following FormLabs resins:  standard, engineering flexible, casting, and dental.  Specifications include: 125 mm x 125 mm x 165 mm build volume; 25, 50, 100, and 200 µm layer thickness; 155 µm spot size.

CubePro Filament 3D Printer

CubePro Filament 3D Printer

Filament Extrusion Printer w/ Dual Extruders for Part Fabrication

CubePro w/dual  extruders.  Supports Nylon, ABS, PLA, Infinity Rinse-Away, Flex, and Wood composite.  Build volume of 240 mm x 270 mm x 230 mm with layer thicknesses as low as 70 µm.  Used to prototype and fabricate parts for lab equipment.

Vellman K8200 Filament 3D Printer

Vellman K8200 Filament 3D Printer

Filament 3D Printer Kit for Undergraduate Projects

Vellman K8200 filament 3D printer kit used primarily to test new printing approaches and undergraduate research projects.

Metrology

Amray 1910 Field Emission Scanning Electron Microscope (FESEM)

Amray 1910 Field Emission Scanning Electron Microscope (FESEM)

FESEM equipped with EDS for nanoscale imaging and elemental composition mapping

Field Emission Scanning Electron Microscope with Schottky 305 Field Emission Source.  Equipped with an EDAX Octane Series Silicon Drift Detector (SDD).  Specifications include: 1.5 nm resolution @ 30 kV, acclerating voltage from 100 V to 30,000V; magnification from 10x to 200,000x (relative to 524 polariod standard) through secondary electron image; digital XYZ stage; scan resolution up to 2560×1920 pixels.  EDS has a maximum energy resolution of 129 eV for Ma Ka; Super Ultra Thin Window (SUTW) for elemental detection down to Beryillium; elemental quantification starting at Boron; peak to background ≥15,000:1; and 10 mm2.

TA Instruments Q20 Differential Scanning Calorimeter (DSC)

TA Instruments Q20 Differential Scanning Calorimeter (DSC)

DSC to measure enthalpy and kinetics of chemical reactions and phase transitions

TA Instruments Q20 Differential Scanning Calorimete (DSC) with RCS40 cooling system from -40 ˚C to 400 ˚C and T-Zero Press and Die set.  Specifications include: ≤100 µW baseline flatness; <40 µW baseline repeatability; ±0.1°C temperature accuracy;  ±0.01°C temperature pression; ±0.1 enthalpy precision; dual gas input (N2 and O2).  This DSC is used to meaasure enthalpy of reactions, heat of vaporizations, and reaction kinetcs of new reactive ink systems.

TA Instruments Q50 Thermogravimetric Analyzer (TGA) w/ Gas Evolution Furnace

TA Instruments Q50 Thermogravimetric Analyzer (TGA) w/ Gas Evolution Furnace

TGA to monitor composition, oxidation, vaporization, sublimation, absorption and desorption

TA Instruments Q50 Thermogravimetric Analyzer (TGA) equipped with evolved gas analysis furnace for sampling output gasses in our Nicolete iS-10 FTIR.  Specifications include: 1 gram maximum sample weight; ±0.01% weighing precision; 0.1 µg sensitivity; < 50 µg baseline dynamic drift; temperature range up to 1,000 ˚C (480 ˚C limit when gas evolution furance is used); ±1 ˚C isothermal temperature accuracy; ±0.1 ˚C isothermal temperature precision; heating rate from 0.1 to 100 ˚C/min.  This TGA is used to measure solvent partial pressures, reaction temperatures, reaction product vaporization temperatures/rates.

Thermo-Fisher Nicolete iS-50 Fourier Transform Infrared (FTIR) Spectrometer

Thermo-Fisher Nicolete iS-50 Fourier Transform Infrared (FTIR) Spectrometer

FTIR w/ ATR and gas analysis chamber to analyze chemical composition of liquids, solids, and gasses

Nicolete iS-50 Fourier Transform Infrared (FTIR) spectrometer with TGA-IR and Attenuated Internal Reflectance (ATR) modules for collecting spectra from gas evolved from our Q50 TGA and solids/liquids respectively.  Specifications include: 0.4 cm-1 Standard Resolution (variable resolution from 64 to 0.4 cm-1); 1 minute signal to noise ratio better than 35,000:1; BaF2 coated, KBr windows; KBr/Ge coated beamsplitter (7800-350 cm-1); deuterated triglicine sulfate detector (7800-350 cm-1).  This FTIR with TGA-IR and ATR modules is used to monitor/measure reaction products, reaction rates, and partial pressures.

Ametek PARSTAT Multichannel Potentiostat Chassis w/ EIS

Ametek PARSTAT Multichannel Potentiostat Chassis w/ EIS

Multichannel Potentiostat w/ two PMC 1000 and one 10 A booster

Ametek (formerly Princeton Applied Research) PARSTAT Multichannel Potentiostat Chassis equipped with two PMC 1000 potentiostats (±12V, ±2 A, 2 MHz EIS) and one PMC 10A booster.  Specifications include: synchronized voltage/current/auxiliary sampling at 500k samples/sec; electrochemical impedance spectroscopy up to 1 MHz; rise time <500 ns; applied voltage resolution between 305 nV to 300 µV depending on voltage range; voltage accuracy of ±0.2%; applied current accuracy of ±0.2% with a minimum resolution of 6.1 pA; voltage and current measurements down to 6 µV and 122 fA; and EIS rnage of 1 MHz to 10 µHz.

Pine Instruments WaveNow Portable Potentiostat/Galvanostat

Pine Instruments WaveNow Portable Potentiostat/Galvanostat

Potentiostat with ±4 V, ±100 mA range

Pine Instruments WaveNow Portable Potentiostat/Galvanostat.  Specifications include:  ±4 V at 125 µV per DAC bit with ±0.2% accuracy; 80 µA to 100 mA with ±0.2% setting and ±0.05% range accuracy.

Nanosurf Nanite Atomic Force Microscope (AFM)e

Nanosurf Nanite Atomic Force Microscope (AFM)e

AFM mounted to EHD Nano-drip printer for topology measurements

Nanosurf Nanite Atomic Force Microscope (AFM) with:  110 μm XY-range; 22 µm Z-range; 0.34 nm Z-resolution; 1.7 nm XY-resolution; 0.4 nm Z-RMS measurement noise. This tool is attached to our EHD Nano-drip printer to measure topology immediately after printing along and also to provide location data for chip alignment.

Mettler-Toledo S470 pH/Conductivity Meter

Mettler-Toledo S470 pH/Conductivity Meter

pH/Conductivity meter for fluids

Mettler-Toledo S470 pH/Conductivity Meter with the following probes for measuring fluid conductivity and pH.  Electrodes include: inLab 710 – 0.1 – 500 mS/cmS/cm; inLab 720 – 0.1 – 500 µS/cm; and InLab Power Pro pH.

Elveflow OBII MkII Microfluidics Controller

Elveflow OBII MkII Microfluidics Controller

Two channel microfluidics control with flow meter for both positive and negative flows

Elveflow OB1-MkIII base with 2 channels installed  Each channel has a pressure range of ±1 bar with microfluidic flow sensors accurate to 0.01% for flows up to 80 µL/min.  

Rheosense microVIsc Rheometer

Rheosense microVIsc Rheometer

Portable rheometer for viscosity measurements of reactive inks

Rheosense microVisc portable rheometer for measuring the viscosity of our reactive inks at room temperature.  Specifications include: 100 µL sample volume; 1.7 – 5,800 s-1 shear rate range; 0.2 – 20,000 cP viscosity range; 2% accuracy of reading and 0.5 % of full scale repeatability (scale depends on visocity sensor chip); 0.15 ˚C built in temperature sensor.

Motic BA310MET-T Trinocular Optical Microscope

Motic BA310MET-T Trinocular Optical Microscope

Trinocular optical microscope for transmission and reflection optical imaging

Motic BA310MET-T Trinocular Optical Microscope with 5x, 10x, 50x 100x objectives  10x eye piece, and 20 MP digital camera.  Works in reflective and transmission modes with polarizer and analyzer optical filters.

Electronics

Signatone S-302-4 Four-Point Probe Station

Signatone S-302-4 Four-Point Probe Station

Four-point probe station for measuring film resistance

Signatone S302-4 Four-Point Probe Station for measuring film resistance.  Station is connected to a Keysight 34420A Nanovolt meter to measure film resistance using sensitivity DCV and resistance measurements at 100 pV and 100 nOhm.

Keysight 34420A Nanovolt/Micro-ohm Meter

Keysight 34420A Nanovolt/Micro-ohm Meter

Nanovolt/Micro-ohm meter for electrical resistance measurements

Keysight 34420A Nano-volt/Micro-ohm Meter for DCV and resistance measurements at 100 pV and 100 nOhm.  USB connectivity compatible with NI-VISA communication protocols.  Used with Signantone S-302-4 Four Point Probe station to measure the resistance of films printed using reactive inks.

Trek 10/10B-HS-L-CE High Voltage Amplifier

Trek 10/10B-HS-L-CE High Voltage Amplifier

High-voltage, high-speed amplifier (±10,000 V with 700 V/µs) for EHD Nano-drip printer

Trek 10/10B-HS High-Voltage, High-Speed Amplifier.  This is a DC stable, high-speed, high-voltage power amplifier capable of precise control of output voltages. It features an all-solid-state design for high slew rate up to 700 V/µS, wide bandwidth and low-noise operation.  This amplifier is used to apply the driving potentials used in our Nano-drip EHD printer.

Keysight 33510A Waveform Generator

Keysight 33510A Waveform Generator

Two-channel, 20 MHz Arbitrary Waveform Generator

Keysight 33510A Two Channel Arbitrary Waveform Generator used to supply waveforms to our Trek 10/10B-HS-L-CE high voltage amplifier for the EHD Nano-drip printer.  Specifications include: up to 20 MHz with 160 MSa/s sampling rate, 16-bit resolution, and USB connectivity compatible with NI-VISA communication protocols

Keysight DSOX3023A Oscilloscope

Keysight DSOX3023A Oscilloscope

Four-channel, 200 MHz Oscilloscope

Keysight DSOX3024A Oscilloscope 4 analog channels up to 200 MHz with waveform option enabled.   USB connectivity compatible with NI-VISA communication protocols

Keysight N2790A High Voltage Floating Probes

Keysight N2790A High Voltage Floating Probes

High Voltage Floating Probes (10:1, 100:1)

Keysight N2790A High Voltage Floating Probes with 10:1 or 100:1 reduction for monitoring high voltage signals up to 25 MHz.  Used with our DSOX3024A Oscilloscope.

Keysight N5752A 600 V Power Supply

Keysight N5752A 600 V Power Supply

600 V, 1.3 A (780 W) Power Supply

Keysight N2790A High Voltage Floating Probes with 10:1 or 100:1 reduction for monitoring high voltage signals up to 25 MHz.  Used with our DSOX3024A Oscilloscope.

Keysight U3606B 30 Watt Power Supply

Keysight U3606B 30 Watt Power Supply

30 V, 1A or 8 V, 3A (30 Watt) Power Supply

Keysight U3606B 30 Watt DC Power Supply with built-in multimeter; 30V/1A or 8V/3A.  Supported measurements include 2-wire and 4 wire resistancemeasurement; frequency, capacitance, continuity, and diode tests.  USB connectivity compatible with NI-VISA communication protocols

Keysight 34411A Multimeter

Keysight 34411A Multimeter

General Purpose Multimeter

Keysight 34411A Benchtop Multimeter to monitor voltage and current.   USB connectivity compatible with NI-VISA communication protocols

Fabrication, Synthesis, and Lab Supplies

World Precision Instruments PUL-1000 Micropipette Puller

World Precision Instruments PUL-1000 Micropipette Puller

Micropipette puller to pull 1 µm pipettes

World Precision Instruments PUL-1000 Micropipette Puller is a microprocessor controlled micropipette puller with up to four programmed sequence steps.  Typical tip is 1 µm in diameter with larger diameters achieved using our microbeveler.  This puller and microbeveler combination is used to fabricate tips for a EHD nano-drip printer.

World Precision Instruments MBS Microbeveler System

World Precision Instruments MBS Microbeveler System

Microbeveler system for beveling micropipettes

World Precision Instruments MBS Microbeveler System to bevel micropipette tips pulled using our PUL-1000 micropipette puller.  Used to bevel tips larger than 1 µm, system is variable speed and includes a SYS-48000 microbevler, light source, microscope, and abrasion accessories.

Plasma Etch Venus 25 Plasma Cleaner

Plasma Etch Venus 25 Plasma Cleaner

Automated plasma cleaning and etching system

Plasma Etch Venus 25 Benchtop Plasma Cleaning System equipped with two digital flow controllers to support dual gas plasma environments.  The entire system is digitally controlled for improved repeatbility.  Specificaitons include 400 W, 50 KHz continuously varialbe power supply with automatic matching network.  Equipment is used for sample cleaning, substrate preparation, and adjusting substrate termination for controlling substrate surface energy.

IKA RV10 Rotary Evaporator

IKA RV10 Rotary Evaporator

Rotary evaporator with vacuum, chiller, and bath temperature controller

Ika RV10 Rotary Evaporator System with integrated vacuum controller, cooling water management, bath temperature and safety features for distilling reactive inks and removing excess solvent.

Purelab Flex 3 18.2 MΩ-cm Deionized Water Polisher

Purelab Flex 3 18.2 MΩ-cm Deionized Water Polisher

Water polisher to supply deionized water

Purelab Flex 3 18.2 MΩ-cm Deionized Water Polisher supplies polished tap water (supplied by RO water in the lab) to Ultrapure Type I water in one step with purity up to 18.2 MΩ-cm with reverse osmosis recirculating through  185/254 nm UV and Deionization Purification. 

Software

Comsol Multiphysics

Comsol Multiphysics

Multiphysics Simulation Software

Comsol Multiphysics simulation software with the following modules: AC/DC, computational fluid dynamics (CFD), chemical reaction engineering, corrosion, heat transfer, MEMS, microfluidics, particle tracing, structural mechanics, materials library, and LiveLink for MATLAB.

Apple's Xcode Integrated Developer Environment (IDE)

Apple's Xcode Integrated Developer Environment (IDE)

Xcode for writing integrated data analysis routines and control software

Apple’s Xcode Integrated Developer Environment is used to write custom software for data analysis and controlling research equipment. These projects are often written by volunteer and FURI undergraduate research assistants studying from the computer science department.  These projects give students hands-on experience writing code for scientific applications.