Affinité Instruments

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Guides, app notes, protocols and insights — everything you need to get the most out of SPR.

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Browse the full list of peer-reviewed publications, book chapters, and preprints from labs worldwide — filterable by topic and searchable by keyword.

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The lensless optical architecture isn't just what makes our instruments smaller. It's the cornerstone of the translational biosensing platform we're building.

How a patented optical foundation enables miniaturization, workflow integration, a path to automation, and signal quality you can trust — and why those are all consequences of the same design decision.

Read the technical note →
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RANDOM ORIENTATION ? SENSOR SURFACE (Au)
Guide

Surface Chemistry Explained

Understand the two immobilization strategies — direct covalent coupling vs. capture-based — and which one fits your experiment.

Cheat Sheet

Decoding SPR Sensorgrams

Quick visual reference for diagnosing common SPR data issues at a glance.

Kinetic SPR — flow-based analyte delivery
Cheat Sheet

Static vs Kinetic SPR

When to use each mode, what data you get, and a side-by-side comparison table.

Affinity determination of LacO / LacI binding curves
App Note

Gene Regulation — DNA-Protein Binding

Characterising the LacI–LacO interaction using the P4SPR in a label-free format.

P4SPR field deployment for RDX detection
App Note

Environmental Field Testing — RDX Detection

Real-world detection of explosive residues in water using portable SPR biosensing.

Drosophila antenna — transmembrane protein SPR study
App Note

Protein–Small Molecule Binding

Pheromone–CD36 transmembrane protein binding characterised by SPR with sub-μM KD values.

Covalent vs. metal-chelated EcAII immobilization on SPR gold chip
App Note

Assay Optimization — Immunosensing

Oriented His-tag immobilization yields 5–10× greater surface density and superior reproducibility for anti-EcAII detection in patient serum.

SARS-CoV-2 antibody detection scheme on P4SPR
App Note

QC of Antibodies — SARS-CoV-2

Rapid label-free quality control of antibody preparations — activity and purity in one run.

P4SPR quad-channel microfluidic design for parallel PPI screening
App Note

Protein–Protein Interaction Screening

Rapid, label-free mapping of EntA–F biosynthetic pathway interactions using the P4SPR quad-channel platform.

P4PRO and AffiPump instruments
App Note

P4PRO: Precision Binding Kinetics Made Simple

How Affinité's benchtop P4PRO delivers high-quality kon, koff, and KD data with a portable, user-friendly design.

AAV capture assay schematic
App Note

Monitoring AAV Bioproduction with SPR

Real-time SPR monitoring of AAV capsid binding during gene therapy vector production.

DNA hybridization dose-response curves comparing SPR and electrochemical detection
Tech Note

DNA Hybridization & Aptamer Biosensor Development with SPR

DNA probe screening with eSPR, split-aptamer hydrogels for vancomycin monitoring, PNA aptamer design for cardiac troponin I, and wearable translation.

Protocol

Starter Test Kit: Immobilization & Binding Assay

Complete first experiment with the P4SPR 2.0 Starter Kit — EDC/NHS immobilization, 5-concentration IgG binding, KD fitting.

Protocol

Covalent Immobilization of Proteins (EDC/NHS)

General-purpose EDC/NHS coupling on carboxyl sensors. Updated for AffiLabs.core v2.0.

Protocol

Metal Chelation Immobilization (Ni-NTA / His-Tag)

Oriented His-tag capture via Ni-NTA for recombinant proteins. No activation or blocking required.

Protocol

Streptavidin Capture of Proteins

High-affinity streptavidin–biotin capture for biotinylated molecules on SPR surfaces.

Protocol

NaCl Calibration

Verify sensor sensitivity (≥ 1700 RIU/nm) using 5 NaCl concentrations. 30-minute procedure.

Kinetic SPR sensorgram — multi-concentration overlay
TN-05 · Tech Note

Static vs. Flow-Based SPR

Comparing static incubation and flow-controlled injection modes — when to use each and why.

Four Key Concepts of SPR tech note preview
TN-06 · Tech Note

The Four Key Concepts of SPR

SPR principle, instrument configuration, sensor classes (thin-film vs LSPR), and surface functionalization — the essentials for every user.

Manual Injection vs Pump-Assisted SPR tech note preview
TN-04 · Tech Note

Manual Injection vs Pump-Assisted SPR

Steady-state vs. kinetic experimental setup — when to use each and what data you get.

SPR Sensor Surface Chemistry tech note preview
Tech Note

SPR Sensor Surface Functionalization & Coupling Approaches

Sensor chip design, surface chemistry options (SAM, NTA, AffiCoat, streptavidin), and coupling method selection guide.

The SPR Sensorgram Explained tech note preview
Tech Note

The SPR Sensorgram Explained

Five sensorgram phases, shape interpretation, quality features, and how the P4SPR generates binding data.

What is your sensorgram telling you — Issue 7 preview
Article

Issue 7 — Your Sensorgram Is Telling You Something.

Field notes from four continents, sensorgram diagnostics, and what we're building next.

AffiLabs.core launch — Issue 6 preview
Article

Issue 6 — Your Instrument. Fully Unleashed.

AffiLabs.core is now available for the P4SPR — from run to results in one session, with SPARQ™ embedded.

US Patent, P4PRO kinetics, carry-on test — Issue 5 preview
Article

Issue 5 — Lensless SPR, Better Data & a Transatlantic Adventure.

US patent granted, precision P4PRO kinetics case study, and the carry-on test.

Looking Back on 2025 — Issue 4 preview
Article

Issue 4 — Looking Back on 2025.

Global lab visits, the three SPR questions we heard everywhere, and what we're building for 2026.

Mobile SPR — Issue 3 preview
Article

Issue 3 — Mobile SPR: Don't Wait for the Core Facility.

On-site SPR testing, 20+ conditions in 2 hours, and a kinetic vs. static explainer.

10 Years mAb Case Study — Issue 2 preview
Article

Issue 2 — Ten Years: mAb Case Study & Platform Evolution.

In-facility antibody characterization, product growth, and a look at mobile SPR.

Affinité Turns 10 — Issue 1 preview
Article

Issue 1 — Affinité Turns 10: Small Instruments, Big Vision.

The founding story, 500+ researchers worldwide, and what a decade of lensless SPR looks like.

PEGS 2025 Poster — A Simple SPR Solution for Complex Samples
Conference Poster

A Simple SPR Solution for Complex Samples

PEGS 2025 · Zhao S., Ricard P., Meredith R., Campbell C., Live L. — mAb characterization during biomanufacturing and IgG1–Protein A kinetics with the P4SPR.

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